Cramps but no period?

Hi y’all,

I’ve had really bad cramps and back pain for about the past week but haven’t gotten my period. And this has happened for about the past 3 months.

I get cramps, think I’m gonna get my period but don’t for weeks. So I think my IUD has moved or gotten dislocated, I go in to have it checked and it’s fine.

Anyone know what could be going on? Maybe I’m crazy or paranoid but I think it could be ovarian cancer. Idk any help is appreciated, I’d just like someone else’s thoughts on it while I wait to go to the doctor