How Can Fever And Nausea While On A Birth Control Pill Be Treated?

Well I basically started taking birth control to help steady my period which lasts more then two weeks and gives me so much pain I cant move and sometimes vomit so I'm not sure if it's a side effect but I constantly have a vomit pain like feeling that's lasted about 10 days and still going but it started kinda like a gut feeling that something bad was gonna happen but it turned into a pain vomit feeling ,another this is that the whole time I've had a fever and I'm really pale with my throat apparently puffy even though I don't have a sore throught and sometimes the pain is a bad feeling, vomit feeling, pain feeling, or hunger feeling and I've tried advil but that ain't done shit for me.