My daughter missed her saturdays birth control pill and then took two pills on tuesday one in the morning and one at night. She is bleed n feels sick?

Not uncommon. Doubling up on ills gives twice the hormone dose and thus nausea more likely. Also missed pills can result in breakthrough bleeding and spotting. Some people are more sensitive to missed pills than others and your daughter will now know that she may brine of those people. Setting a cell phone alarm daily can help her remember.