Been really paranoid about being pregnant lately. I had sex Jan 20th got my period Jan 22nd , didn't have sex since then and got my period Feb 18th. (Everything on time) I recently went off birth control and 5 days later I got a Period (I'm guessing it had something to do with discontining the birth control). I was on birth control when I was sexually active, I used condoms and withdrew . Think I could be?