Please Help!?!?!? confused

I've been on the bcp for a month and 3 weeks I've had a 4 day period I guess and missed the pill twice by hours and since then I've been having pressure and stomach aches cravings being very tired and I called my doc but he said that's normal my stomach aches get so bad that if feels like sharp pains where I don't want to get out of bed is that really normal? please help!?!?!?