Help! Condom broke 5 days after period, what's the chances of becoming pregnant?

Ok so my boyfriend and I had sex five days after my cycle ended. The condom broke when he was taking it off so the next morning he went and got me a plan b. I never take these and I'm not on birth control either, I couldn't swallow it so I spit it out. (I hate pills) yesterday after we had sex I was bleeding and I've been bleeding and cramping all day. My boobs are sore and swollen, and the bleeding started with a pink/brown discharge then started to look like a period. I'm not sure as to what is going on has this happened to anyone? Advice? Should I take a hpt or is it too early?