I recently had a pregnancy scare with my boyfriend we had intercourse for about 1 min. And he didn't in me but he had precum it was my first time unprotected so I had a nervous break down I think I was so worried I made myself sick that was on August 23rd then on sept.11 I got my period but it was not normal it only lasted like 3 days compared to the usual 4 or 5 so I got even more worried since then I have taken 10 hpt and all have been negative. But then again on oct. 5 I got my period and again it was shorter then usual I still had all the blood clots and everything it was just shorter then usual now again I'm worried that I could be pregnant if not what could be causing it to be irregular... lately I have lost 10 pounds unintended and I have been feeling a little lightheaded

Time to go to your doc. Something is going on with you. Maybe your thyroid.