spotting in undies ?‼️

this is a lot of TMI but last night my boyfriend and i didn’t have sex, he just fingered me super hard and deep. ANYWAYS, once i went to the bathroom after i had brown ish red (mostly red) stuff on my undies. i wiped after and there was a very small amount of blood on the toilet paper. i am NOWHERE NEAR my period so it couldn’t be that. does anyone know what happened?