we used 4 different methods of birth control, but I'm still paranoid I could be pregnant.

Me and my boyfriend have had sex multiple times this month. We've been extremely cautious and have used multiple forms of birth control, but I'm still worried I could get pregnant. I've been on a birth control pill(Sprintec) for about 3 years, we used spermicidal condoms, spermicidal gel, and he pulled out. After the first time I took a plan b pill also. I've been experiencing cramps, headaches, and have had acne flairups in the past week, and my period is due in the next 3 days. What are the chances that I could be pregnant?