Memory Foam and body pain ?

I feel like my memory foam mattress topper is making my pain worse... Has anyone else experienced this?

Currently I am using the soft, squishy yellow-ish foam pad and on my old bed I had one of the thicker, firmer, cloth-bound mattress toppers.

I can't afford a new mattress at this time (but I'm saving up!) Are there any good alternatives to memory foam that would help ease even a little pain?