Me and my bf had sex say 3 days after I had my period,,he dit came in me...so its 5 days after we had sex...and if been feeling really weird. I have back pain and also feel like I have to puke for some tipes of stuff... If been having cramps on my tummy,,,but its not so bad...my nipples don't hurt and I also don't have spottings?? Can I be pregnant??