I'm on the pill but not sure, help!

So I'm 17, me and my boyfriend have sex, and I've been on the pill for 2 months and he uses condoms every time. The last time we had it was like 2 or 3 days before I got my period, and the condom broke right as he came, but I got my period that month. Now I'm a day late on my period for this month, and I'm worried I could be pregnant!?