Birth control and period

So I just started taking the pill and this should be my first period. However, because I was lazy I started taking it halfway through my normal cycle, it should’ve pushed it back by two weeks. Well during those two weeks I had random but definitely annoying cramping but now I’m in the white pill stage it still hasn’t come? I’m almost midway through what should be my period week without one in sight. I’m greats are tender (which isn’t a usual thing) and my mum said that only happens when you’re pregnant; which has basically lead to me being super anxious about getting this period. Unfortunately my bf slipped in a few times before I started birth control, although it wasn’t deep and it was only precum. Am I just overreacting or should I be worry? Please help me out xx