Condom broke but on the pill

My boyfriend and I were having sex tonight and the effing condom broke... We usually do it without one but he pulls out before he cums. I've been on the pill for almost 4 years now and have always been so careful about taking it. I've never completely skipped one but every so often, I forget to take it one day so I'll take 2 the next. I 'm currently on my sugar pill week so I'm unsure if that affects things at all. I usually don't get a period anymore at all because I am on the low dose pill. Does that mean I don't even ovulate..? Tonight we used a condom because it makes him last longer. I didn't even realize that it broke until he said something. Do I need to take a Plan B? I literally had to pull over on the way home and throw up because it made me so terrified... Any advice would help...