Mattress Forum

I ditched my problematic Kingsdown and bought a Shifman Renoir.  It came yesterday and I slept on it last night.  This morning I woke up with my left shoulder and arm completely numb, usually a sign for me that my mattress is too hard and aggravating the pressure point.  Now, I know it has been one night, but I am nervous that it is too firm, despite this being their softest mattress.  So, what do I do to soften this up if I continue to have shoulder pain? Do I get a latex topper or feather/fiber bed and which one, from what company? I am fairly small at 5'3 130 pounds.  Any suggestions would be greatly appreciated, as I am upset that now I might have an uncomfortable mattress and hard time sleeping.

Thanks

Amy