brown discharge after unprotected sex?

Hello ladies! So last Friday I had unprotected sex. Most of it was with a condom on and then maybe 5 minutes without a condom later. Afterwards I was getting fingered and the guy told me I started bleeding. This is my third time having sex and as far as I know, my hymen has not been broken. I have bled before when being fingered but that was from being cut from fingernails. This time I also got cut but I believe I'm bleeding more internally. Not enough to fill a pad but I've been wearing panty liners daily. It's similar to spotting or just having discharge but it's brown. Sometimes I'll see red. If this was my period it would of been 2 weeks early. STI's are my other guess. The guy also did not cum in me. Any ideas on what this could be??
Thank you in advance for any advice!