I do not do it any more due to change in environment (my abode), but earlier once every few months, I would take a thin comforter below me, one thin comforter a

I do not do it any more due to change in environment (my abode), but earlier once every few months, I would take a thin comforter below me, one thin comforter above me, and all that on the carpeted floor. Any time I had a back pain, I knew this was the way to fix it. Also, my mattresses used to be firm. Somehow my last 2 mattresses have become saggy after just over a year. I dumped the first one, but now wondering what to do for the second one and with the covid situation and not everything open, I just have not had the time to chase things, and my mental estimate is that my body requires one hour less sleep (I am not pushing it, that's how it ends up) on a firm mattress.