I’m 22 years old and I’m on the birth control pills. My circle is usually 28 days with a period lasting 3-4 days. I got what I think is my period on May 9th but it only lasted two days (19-21). On the 22nd I got a sudden pressure in my vagina area. Not like my normal cramps which I feel more around my belly button. My last period was April 21-23. I had sex on the 24th. Ovulation peak was then May 4th. I had sex the 8th and 12th. Then the period I mentioned before on the 19th. ive been having back pain the past two weeks too. Just wondering if it sounds like I could be pregnant.