Pregnant or not.

Hello alll!!

I am 4 days late on my period and I feel off and confused. I have so much watery CM which I keep thinking its my period. I’m also like crampy and extra gassy (weird and TMI) sorry! But my back hurts and my head. I took a pregnancy test before I missed my period and it was negative. I keep feeling like my periods coming and it’s not. Is there a chance I’m pregnant? Are any of these pregnancy symptoms? I would appreciate all the help I can get! Thanks everyone