Ok so i have been on birth control for like a year now and i have always had my period at the same time. But this month i was suppose to start my period on monday and i didnt and it is now Friday. I have never missed a period. The only things that are different are i have been craving pickles and i have been getting dizzy alot lately and my sense of smell is really strong.Oh yea and i have been eating alot latley. I took one of those early pregancy tests the ones that you can take like 3 days after your missed period and it came up negative, so i dont know what to think. I dont know if i could be preagant or what?