Why am I missing periods?
930849
Weight loss and stress can interrupt your cycle--your body may decide (via hormones) that it's not a good time for you to have a baby and prevent ovulation.  Other than that, menstrual cycles are often irregular when you're a teenager.  But you should consider telling your physician about your heavy and long periods--you're losing a lot of blood, so you may need to take iron supplements (I did).
118048
Your body takes a few years to fall into a regular cycle, so it's normal for you to miss a period once in a while. If you continue to skip periods after two years, then you might have a problem.
391338
You really need to go to your doctor to get tested and checked out to see what is going on.  It could be possible that you are still ovulating even though no period, but the only way to know for sure would be to get tested.\nThere are many reasons for menstrual abnormalities including hormonal imbalance, stress, weight gain/loss, medications, illness, thyroid, polyp, cyst, amongst other reasons.
805434
Only if you have become pregnant.  Most of the time, missed periods are usually due to pregnancy and not really due to the STDs.  You can take a pregnancy test to be sure.  Good luck!
312605
oh yeah. If you miss, you double up, miss again, etc. your period can most definately be effected. A call to your dr. or even an online search for missed pill, took 2 might bring up some answer for you. You can go to the store and take a test to be sure. Mine always started the day after I took a test!! I'd get all nervous, then spend $12, and boom! there it was.\nGood luck
207557
There are several reasons that could be causing a delay in your period. Some are more serious than others, and there are factors that have to be determined, like how often does this happen and how many months you go without getting your perdiod, you might not even be ovulating. The best thing you could do is see a doctor, that way you will know if it is just transitory, have test done, and if necesary, you can recieve treatment.
1143765
Your doctor gave you pills after only missing your cycle by four weeks?  Talk to him again if you can.  Most women will miss the occasional menstration due to many different reasons.  Sleep changes, climate or seasonal changes, air travel, sickness, and the lists go on, and you might not even know why you missed it.  It is generally said by doctors that it's alright to miss the occasional menstration by 8 weeks, after that, then doctors can do some testing and examinations to make sure that nothing else may be going wrong.  I'd wait it out one more month, and see if it will return to you on your own.  But make sure you try to relax, being worried will only hault the coming of your cycle.  Good luck.  :)  If you suspect pregnancy, your doctor can get you tested very easily.
364691
any medication, stress or pregnancy can cause you to be late or not have a period at all. So try to stop stressing about being late, then think about how long you've been taking those antibiotics and if wheather or not they have always made you late, if the answer is no and you've stop stressing, then Congratz you might be pregnant. Go seee a doc about a pregnancy test.
482867
Maybe nothing. It could be stress that's making you have another period. If you have abnormal bleeding or cramping you may want to see a doctor.
71659
It could be a hormonal imbalance, but it could be fine.  Sometimes, when you are really stressed out or busy or not eating/sleeping/etc well enough, your ovulation will be delayed.  So, try to think back to the time right after your last period (before this one).  If you were traveling a lot, or dealing with a lot of stressful stuff, maybe that's the reason.  I would say, just wait a few months and as long as you get back on a mostly normal schedule, don't worry about it.
1117421
It can sometimes take a while for everything to go back to normal. I had my second son four months ago, and my first period was over a week and a half late. \nIf you still feel worried about this, go to your doctor and seek a professional opinion.
490536
Well, if you have low body fat content, that is enough for you to have irregular/no periods.  Generally dancers and athletes have this problem.\n\nSometimes a BCP (Birth Control Pill) prescription is enough to fix this problem, as it regulates your hormones.\n\nBut enjoy the no mess!  It's a rarity that women get to go this long without anything.  But always have something on you, just in case -- you never know when it may start up on you again!
1160201
diet is sometimes a cause of irregular periods,try a good vitamin,if this fails ask your Doctor about a D&C this is a simple proceedure.painless.....A simple sraping of the uterus and regular periods should resume.The lining in your uterus can sometimes build up when this is scraped out normal periods will return.......and things shoul go back to normal.....Sharlene S
721622
You first need to see a doctor for an exam and testing to determine why you haven't had one. Menstrual abnormalities can be due to many things including pregnancy, stress, hormonal imbalance, thyroid, medications, illness, infection, polyp, cyst, amongst other reasons.  Please do see a doctor.
974276
missed period now on the patch
774766
I would talk to a doctor, he may have something that he can give you to regulate you.\nYou should only be having a period approximately every 28 days.
473447
There is the possibility that you are pregnant, but your period may also need more than one month to get back on a regular schedule. \nGet a test kit and make sure.