Hi cindyg,
Welcome to the Mattress Forum! 
You may have read this already but in case you haven’t the first place I would start your research is the mattress shopping tutorial here which has all the basic information, steps, and guidelines that you will need to make the best possible choices … and know how and why to avoid the worst ones.
The better options and possibilities I’m aware of in your general area are listed in post #6 here.
Phoenix