I had a period April 8-11. From the 11-15 and the 17-22 we had sex, unprotected. He ejaculated in me a few of those days. On the 23 I started another "period" that ended on the 24. No cramps, no warning, nothing. I have regular 31-33 day cycles, cramps, the whole 9 yards. The blood was light in flow, and darker than it would have normally been on the start of my period. I was supposed to start birth control on the 13 but only ended up taking 2 pills in all and then stopping. Since the short "period" I have been super gassy, some nausea, and experiencing some abdominal cramps/pressure. My boobs have been extremely sore. If it was a period, my next will be the 18 of May. If it wasn't, it should be the 9. I took a test today (the 30) and it was negative. Were those 2 birth control pills enough to throw off my body this much, or could I be pregnant?