It's 4 days past the day I should've gotten my period. I'm extremely scared that I am pregnant. I have been on combination pill for months, and take it daily as needed. However, I did get a bladder infection and had to get it treated, and I am wondering if that may have stopped the birth control from temporarily working and caused me to become pregnant?? Also, the day after I ended my birth control I had unprotected sex but I took plan B.