Extreamly painful periods..

Br

So me and my husband have been ttc for about 7/8 months now and and it seems like each period I get is worse and worse. The pain gets to the point that I'm curled up In a ball and cant move, And it's so painful to even just walk. And they've gotten quite heavy. It's not just cramps but it feels like it's my whole entire front and backside. It feels like I have knives going inside of me. I have regular 27-29 days cycles and they are on Time every month, but the pain is unbearable. I know some woman in my family have had fibroids but since I have a regular cycle I dont know if I could have anything like that. I have an appointment with my obgyn on the 26th but I'm scared something is wrong. I track my cervix postion and noticed I have a small bump on my cervix but it's not there anymore, I'm starting to wonder if I have some on the inside of my cervix, which could also be why I'm not conceiving..Does anyone have any advice or know what could be happening?