What Is The Brown Blood Discharge After Having Sex?

hi, about a month ago me and my boyfriend had sex for the first time, however the penis was only in for a few seconds and he did not ejaculate. i took levonelle one step as a precaution and my period came 4 days late. i took a pregnancy test a couple of days after my period finished and it was negative. its been a week or so since my period finished and my boyfriend fingered me, it didnt hurt but i found alot of brown blood afterwards, this was yesterday and i am still getting brown blood mixed with abit of red. this isn't the first time he has fingered me, but i have never had this before =/ please help, i'm really worried.