So I've been cramping since Saturday, and my period was supposed to come on Monday I'm two days late still a lot of cramps and no period yet and my period is very punctual I know it's best to wait a week before taking a test but it's my 25th birthday Friday and I would like to partake in a little drinking if I can. Will I get a false negative of I take it Thursday morning?? That will be my 3rd day being late... BTW drinking not that important but when it's ur bday and u are a drinker that's not drinking ppl ask questions.