Hello Dr I Have An Urgent Question I Didn't Find

Hello dr i have an urgent question i didn't find someone to help me so 2 days after i finished my period my boyfriend rubbed his penis against my vaginale until i had an orgasm the day after i found dôme Brown spot on my underwear and im a Virgin so i really wana know if those spots are related to loosing my virginity or some blood from. My period ???? Plz answer soon