Back Cramps

Okay, so it's a lady problem, and I need advise. 
For almost my whole time since I came on my period 5 years ago, I get almost constant severe back cramps. I get it in my lower back, like right now, my back is in so much pain I can't move... does anyone else have this issue? Where the back cramps are so intense and painful than tummy cramps? 
Can anyone suggest any ways to relieve the pain? Other than hot water bottles and pain killers? (I'm on a lot, I've tried solpradol, feminax, cocodamol, paracetamol and ibuprofen) I'll be so grateful if anyone can suggest anything!💗💗💗