I need help!!

I currently take birth control (the pill) , I’ve been taking it on and off this month, having to take 2 in one day multiple times. I switched from taking it in the morning to taking it at night because I would get really sick. Well I’m currently 3 days late for my period and woke up an hour before I was supposed to feeling really sick ( nauseous ). I’m not sure if it’s from messing up my birth control so bad, orrrr if I’m actually PREGNANT😔 what do you think?