Birth control killing me??

So I just started this birth control on Sunday. I take it at 7pm so that I can eat with it. But last night I didn't really eat with it and I woke up at 3am super nauseous and it started as sharp cramps and now I still am nauseous. Could it be the birth control or something else?? Should I stop taking it or wait another day to see if it really is the bc?