I Have PCOS And I Haven't Had A Period In

I have PCOS and i haven't had a period in i think over 5 months but i had unprotected sex multiple times this month and soon after i started getting pregnancy symptoms, headache, mild bloating, my stomach gurgles a lot, I'm always tired, i randomly get emotional or moody for no reason.
on friday i started getting brownish discharge coming from my vagina but it wasn't enough for a tampon or anything. i took a pregnancy test when i got the symptoms (about 2 weeks ago) but it was negative.
what do you think is happening? am i pregnant?