Irregular period

So my period is super irregular I’ve been a Virgin for almost 24 years but I finally lost my virginity 8 months ago it felt amazing my period had just ended I’ve had sex about 6 times since then, I have PCOS now I’m worried because I haven’t had a period since March 12 2017, no I’m not pregnant ive done about 6 pregnancy test and all negative two before surgery, three after and one a couple months ago at the obgyn, now my concern is right now I have brown discharge with some blood and cramps does that mean my menstrual cycle has arrived?? Please help if you know anything, I’ve also been taking birth control since I was like 12 to regulate my hormones