So, I have been on birth control for 4 months now. I had unprotected sex 3 days ago on a Saturday but he did not cum in me. It's been 3 days, now Tuesday. I started taking my reminder pills the sunday following the sex. Note, I took my last birth control pill after the sex that day(saturday) at my usual time. I thought I started my period Monday night but it was very light. Now Tuesday night and its like I'm not even on my period. I'm a very paranoid person and we rarely have unprotected sex. Usually I would have had a normal period by now.

Sorry for being paranoid but am I pregnant? Or has my birth control failed or something? This hasn't happened before.