So On October 4th I Had Sex With My Boyfriend

So on October 4th I had sex with my boyfriend and the condom broke. He claimed that he did not ejaculate and that he wiped of the pre-cum before putting the condom on. But we took precautionary measures and I took a Morning After Pill the next day, October 5th, around 1 o'clock in the after noon. Today, October 6th, we had sex again and the condom 'broke' (we don't know for sure on whether or not it did). Should I take another pill? What are the chances if I do or don't?