Girls, can anyone tell me if they've had something like this... Someti…

Girls, can anyone tell me if they've had something like this... Sometimes it hurts the back passage, I don't know how to explain, it feels like a small pop and will go away I thought about symphysis pubis, but there's pain in the forehead area I read about pelvic bone discrepancy, but it's still pretty early... maybe someone has experienced this? Forgot to ask the doctor today about it.