HELP!

Alexis

I’m 29 days late on my period, for the past four or so days I’ve had terrible terrible cramps that feel like a period... well honestly they feel worse than my normal period cramps, I also had a light pink discharge when I wiped about two weeks ago or so.. and that lasted for about four days, I’ve been extremely tired. I’d automatically think okay pregnancy... But the thing is I’ve taken two pregnancy tests on two different occasions and they’ve both came up negative. What’s going on?