Unsure of what is happening

My body is feeling super weird. The condom broke a few days ago and I had just started my birthcontrol. I took a plan b the next day. Then last night me and my boyfriend had unprotected sex again. I've only been on birthcontrol since Monday ( it's now Saturday)  is there any chance I could get pregnant, I feel like I can't because the plan b stops ovulation. I'm just curious for anyone's opinion