Im not really sure what's going on I get my period every 38-40 days and I am late 1 day and got a negative pregnancy test. My fiance and I are trying to get pregnant. Shiuld I wait to test again or is it too early to know I got my last period nov 10th. I have been having a lot of headaches. And nausea and cramping like my period is coming but still isn't here. What should I do?