TMI bleeding after sex???

🔆 QɄł₦₦ ✨

today is day 5 of my period day 3 + 4 were so light i didn’t use a pad or panty liner all day, so tonight i had sex, everything went well ass i go into the shower i start to bleed, not second before and the blood is loose and runny has this happened to anyone before?

photo is my inner thigh.