I have really bad crapms but not getting my period...?

I have been having really bad cramps all day today and felt grossed out when i tried to eat.This happens frequently before i get my period only this time the pain i have is diffrent, its like in the lower part of my stomach and its a wierd pain not like pms cramps.and the things is i also had unprotected like twice this month. Could it be possible to be prego, or are they juz pms.