I had protected sex 10 weeks ago, and was on the contraceptive Yaz at the time. I missed my period for that month, and was terrified. The next month, I got a period but it was shorter than usual but much heavier. This month, I also got a shorter, heavier period. Over the past 10 weeks, I have taken 19 pregnancy tests, ALL negative. I have no nausea (unless I haven't eaten, but that's normal for anyone), no tenderness of my breasts, no darkening of my areolas, minor back pain (but i slump over all the time, so that's probably causing that), no cravings, i've actually LOST weight...but I have a pudge where a baby bump would be. I haven't thrown up once or gotten sick at the smell of anything. I haven't been particularly moody. And I sleep just as much as usual, if not less. I've been told it is impossible to have 19 negatives, heavy periods, no symptoms, but still be pregnant. But I'm scared.