I am 4 days late for my period. i've had cramping for 3 weeks, very fatigued. taken several pregnancy tests at various times of day all negative.

Could be pregnant: You're 4 days late for your period ; have a neg preg test, but don't mention if your menses are reliable or if you've been on birth control in the past few months- including taking the morning after pill. Using contraception, breast-feeding or a recent pregnancy are all reasons why your period may not be reliable. Nausea? Tender breasts? Check another am preg test, if neg, go to a provider.