I'm always regular with my period I have taken 4 tests and its all negative. But I have had minor cramps for the last few says as if it was going to start but no blood. I also have been getting headaches and like a week ago I started to eat a lot where I couldn't get full which has happened the last two time that I was pregnant. So can I be a few weeks pregnant and that's why my period is missed?

If you've had sex, yes, you could be pregnant. Ask your Pharmacist which HPT kit is best for you.