@wildflowerchild25:

Funny, i have the exact same situation with my bed. Bought a mattress online that turned out to be too firm, then topped it with a slab of memory foam that turned out to be too soft. Now got rid of the memory foam and am just putting up with the mattress. I don't find it that bad after the ordeal with the memory foam. Hope you find a solution that is comfy for you. Waking up with a sore back is lousy.