so 3 weeks ago my boyfriend and i had sex for the first time. he used a condom, so i wasn’t very worried. but around 5 days after that night i got a weird brown discharge at work. it wasn’t a lot at all, and the day after i got a just a little bit of it. on and off, never consistent. i took 4 pregnancy tests the week my period was supposed to start. all 4 were negative, including the one i took the day after my period was due. i’m now 6 days late and there have been no signs of it. i’m not having any pregnancy signs, but i’m also not getting any of my pms symptoms... is there an explanation? is there something i should do..?