Hi Chief,
While your own “best judgement” about your own quality of sleep and the other points I mentioned would be better than mine (I can’t feel what you feel on your mattress) … based on your description it certainly sounds like you need a new mattress or at least a new comfort layer if the air bladders are still in good condition.
If you do decide to look for a new mattress then the first place I would start is the mattress shopping tutorial here which has all the basic information, steps, and guidelines you will need to know how to make the best possible choice … and know how and why to avoid the worst ones.
The better options and possibilities I’m aware of in the Jacksonville, FL area are listed in post #7 here.
Phoenix