Just wondering in anyone has experienced this and also asking for some opinions. My boyfriend of four years and I had sex yesterday, and when he finished he noticed some light colored blood on his penis. It wasn't from him, we checked, but I know that my period is not for another 9 days (thanks to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>. and birth control pills). I am small, with a tilted uterus, and he is on the larger side with a slight curve fyi details. When I went to go to the bathroom this morning, I noticed that when I wiped a light pink color of blood was on the paper. I didn't feel any pain during or after sex, sometimes I do get postsex cramps... What could cause this, and should I see a doctor?