Help me finding a mattress
**The Issue**: So every mattress that i have used so far, after sometime start to give me back pain. The back pain is either around my shoulder blades or under it and sometimes its on my spine. Most of the time, i had to get up at night to stretch myself and somtimes it hurt me so much that i have to sleep on the floor (with 2-3 layers of comforter + blanket).
Previously, I have tried Endy's mattress and i had to return it with in 90 days since it started to hurt my back. Then i went to sleep country and they gave me the their "second" stiffest mattress. The mattress was great for first year. Now it has deformed at multiple places. Unfortunately, I can't claim for warranty since it has some stains on it (coffee spills).
So i am here, seeking help that if someone has been through same sort of pain or experience, what kind of mattress helped you guys. Or if you are an expert in this field, please help me out.