For a while my period come for about 3 days every 3 months. Before that it was normal ( never on time ) for about a year. Now recently I haven't hand my period for so long !!!!!!!!!! 4 months and I'm starting to feel really sick, as if I'm having period pains. It's like I'm getting my period but without blood and just my cramps. Should I go see the doctor ? Does anyone have any advice ?