Am I pregnant?? Help!

So I’m 8 days late for my period.

I’ve never had sex but my Boyfriend and I often fool around and his penis has touched my vagina when he’s tried to give me anal (TMI but it hasn’t gone in though because my ass won’t stretch out enough😬)

One night, 4 days after my period we did fool around again. I actually inserted a tampon in my vag so when he tries to give me anal and it touches my vagina, no sperm could go though? (I know it wouldn’t help but I wasn’t in the most clear state of mind)

Anyways, after 1.5 weeks I suddenly got weird brown discharge coming out of my vagina and I have no idea what it is. It only lasted a few hours then it stopped. (It was after my ovulation period too)

NOTE: have been extremely stressed during the time slightly before my period was due and during as I’ve had exams that stressed me out and made me lose a lot of sleep. Could that be the reason my period is late??

Since then nothing has happened. I haven’t had any pregnancy symptoms (like sore boobs) I have been hungry and bloated but that’s about it (I heard that’s also a pregnancy sign so that’s even more concerning)

I am terrified sick. please help!