I Had My Period Oct. 23 And Had Sex With

I had my period Oct. 23 and had sex with my boyfriend twice (Nov. 12 and 16). I took morning after pills (take action) within 16 hours on Nov 12 and within 2 hours on Nov 16. He used the pull out method and claims nothing got in but I wanted to know if my chances of being pregnant is high. Today is Nov. 17 and I am having a lot of back pain and slight cramps but not too bad.