TMI- advice?

I'm in my fertile time and we had sex yesterday morning, the i work 3-11 last night and all night it felt like my period had started wetness feeling and even cramping not as bad as my period though... i went to the bathroom and wiped and it was all CM but only one circle/piece of mucus like blood was there i'm probably just over thinking it because i mean i NEVER bleed unless it's my period. my periods are VERY regular, on time every time, same time every month, just right on. so seeing any kind of blood will freak me out. and i never bleed from sex. ever me and my SO have been together 2 years and never has something like this happened i'm also cramping so bad what does anyone think? just to ease my mind. i hate how you don't know what going on inside of you!!!!