A few weeks ago, I was staying in Michigan with my best friend and her family for two weeks. (I live in Texas) I got my period a week early. My cycle is normally 36 days, so this time it was 29. My mom said it was because their hormones were stronger than mine. It has now been exactly 36 days since, and I haven't gotten my period. My boyfriend and I do have sex, but we use a condom every single time. I'm very paranoid. Help?