Help I need opinions.

Brittany

So I started cramping Sunday then Monday and today I’ve been cramping so hard it’s actually taken my breath away and I’ve had to sit. I usually don’t cramp at all and never this early. My period isn’t due until Friday. I took my very first round of clomid this month. Ive taken pregnancy test and it says negative but now I’m so unsure. What could be going on? Should I call my doctor.