Hello, tossed away my old Simmonds for your Polysleep, very satisfied at first but after a week I started to have shoulder pain (I sleep mostly on my side. I have waited a few more weeks to see if I would ajust to it but this is waking me up at night. I do not know if I should return it because it is very comfortable when I sleep on my back, which is lets say 30% of my nights. Do you have a solution? Maybe I should add a layer of foam? Thank you