Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Upset Stomach

I was taking this product for 5 days when I started to feel extreme discomfort in my stomach. The next day I developed a fever of 101F, and was feeling worse to the point that I considering going to emergency. While I was trying to figure out what changed in my diet that would give me such pain, I thought of Move Free, because it was the only thing new, and immediately checked the reviews here, on Amazon. I was so relieved to find the possible culprit! As I stopped taking Move Free I recovered very quickly. Beware of the bad side effects!!!