Periods - Is This Normal?

I usually have a pretty high pain tolerance, but I'm currently curled up in a ball, sobbing my eyes out because the cramping in my stomach is UNBEARABLE. My periods are usually heavy and painful, but they seem to be getting worse each time. The pain in my stomach is travelling into my legs and spine, and it hurts to stand/walk. Is this normal? Does anyone else have periods like this? If you've been to the doctors, what did they say/do? 😫