I started taking birth control two days ago when i started my period but it's making me vomit a lot , can i stop taking them until after my period?

You shouldnt: If bcp are stopped, no pregnancy prevention will occur. This is somewhat common when starting the pill. Try taking them before bed with vitamin b6 and a unisom. Eventually most women develop tolerance to this side effect. If they don't, a lower dose pill may help. Unvarying is the lowest dose hormonal contraceptive and us placed vaginally, which may avoid nausea altogether.