I did the same thing as rose, we bought a memory foam bed topper, the 1 1/2 inch size. They worked wonders in not just our back pain but my hip pain too. The thickness varies from 1 1/2 inches, then 2, and 3 inches. We got ours at Target, then queen size was $80, the king in the 3 inch size I believe was $169, but considering how much mattresses cost it is a deal. With our 12 year old mattress getting saggy with dips was adding to our pain, but we can't afford a new one, so this was a perfect option. With all my pain, back, lupus and fibro problems I've had a hard time sleeping, but this has given me the best sleep I've had in a long time. Like she said almost any store that has sleep stuff will have these toppers; well worth the cost