I think I’m pregnant...

I’ve been on birth control (the pill) for 3 months, I just started my fourth pack today. Since I’m on the pack I’ve decided to keep having periods and they’re always on the sugar pill days, but I haven’t gotten my period and it’s been a week and a day. I have been sexually active, my boyfriend always picks me up when he gets off work and we normally have sex without a condom, but he doesn’t cum in me or anywhere near my vagina. I’m aware that there is a possibility of pre-cum being able to impregnate someone, but I’m just worried that I actually am pregnant. My period should’ve regulated by now and I’m starting to get extremely worried. I haven’t had any pregnancy signs so far that I’m aware of either. Please help.