So I was suppose to start my period the 6th of this month and I haven't gotten it yet. We'll I've been having headaches, and during the day I get spurts of hunger, or my sugar gets low, I've been having cramps like period cramps but no period, I've also been having a "nervous stomach" if that makes sense. Can anyone tell me what I should do. I've taken a test maybe 3 or 4 days ago and was negative. But when the tests are wet there negative and when there dry they are positive so I don't know what the hell to do. :( I've been so tired and exhausted. Help please.