I Had Sex With My Boyfriend Last Week, I Forgot

I had sex with my boyfriend last week, I forgot to take one pill the night before, we had sex twice in a row but he did not ejaculate in me; I took two pills that day. It was aBout 3 days later I started to feel menstruated type cramping, I am afraid to find out if that is me becoming pregnant?? Also, I took two pills the day after by accident