My period is 4 days late. I feel nauseous, my boobs are tender, i feel light headed, i have faint cramps and i get a ton of headaches. I dont eat the foods i used to and i cant explain why. I have taken 2 test and they both have said negative. Idk what to do because my period has never ever been late and the fact that its 4 days late and im feeling like this but yet the tests are coming out negative. What do i do?