Hi jimmy462,
I think the first thing I would suggest is some time becasue your mattress will go through an initial break in period as well as you will go through an adjustment period when you change your sleeping surface. Post #2 here and post #2 here should be helpful.
If it becomes clear that the long term feel and performance of your mattress is too firm for you … then post #2 here and the ones it links to will help you decide which topper may be best for you.
Phoenix