PMS or Pregnancy?

Question

pregnancy?" /> okay so i know nobody can actually tell me what's going on (i'm going buy a test today though) but last month, i skipped my placebo pills so i wouldn't have my period (it was around my birthday) well about 2 weeks later, into my new pack i started spotting...which usually happens when i try and "skip" a period. i haven't missed any pills during this pack or even my last (not including sugar pills). i'm about 3-4 days away from my period, considering i start taking my placebo pills tonight. is PMS the reason my boobs hurt & i'm a bit tired? i'm even cramping a bit :/ i'm still spotting a bit, too. is it most likely PMS or a chance of pregnancy?