irregular period or pregnant?

My boyfriend and I had sex about 2 months ago, we use a condom. It seemed intact, but we didn't really check. I'm not on any form of BC yet but I will be soon. I got my period last month and it was heavy and lots of cramps as usual. I haven't had a period at all this month and it's the 31st (of October). I was stresssing out all week last week but now I'm more calm, still a little bit worried but I'm more open to people's advice and help. I'm 15, I'm notorious for having super irregular periods, I've done this before, where I go an entire month w/o a period then out of no where it comes around! I've been having this milky-white, slimy discharge, and I looked it up on google and it said I'm