Hi Mamie,
Unfortunately it seems that something has either changed in you or in your mattress
I looked through your earlier posts and it appears that you have a 3" Dunlop topper that you mentioned here.
It also seems that you have a firm Serta that we talked about in post #8 and #9 here.
Your mattress contains at least 5.5" of lower quality polyfoam in the comfort layers and based on your description of your symptoms (which seems to indicate you are probably sinking down too far in the hip/pelvis area) and on your mattress’ description the most likely “culprit” is the thick layers of lower quality polyfoam on top of your mattress.
Since the odds are fairly high that the underlying cause of your symptoms are alignment it probably wouldn’t be that effective to add another topper which will only add more soft foam to the top of your sleeping system. A topper can be effective for helping with pressure relief but isn’t usually an effective way to deal with support/alignment issues.
If your mattress still has a firm even surface and hasn’t softened under the heavier parts of your body and since your topper is latex which is likely to still be in good condition then the next highest odds would be that something in you has changed and since your symptoms appear to be alignment related I would consider a thinner topper which would reduce the amount that your hips/pelvis sink down into the mattress and may create better alignment (although this may not be effective if the foam in your mattress has softened)
It would also be worth turning your mattress 180° (or 1/4 turn if it’s king size) which may put firmer foam under your pelvis and see if it helps.
If that doesn’t help it may also be worth trying to flip your mattress over (even though it’s one sided and not designed to sleep on the bottom) and using the topper on top to see if that makes a difference as well.
Phoenix