It's possible that your mattress is old. Did you know you are supposed to turn it over every six months? You can get a quilted mattress cover for about ten bux anyplace that sells bedding and that will make a surprising improvement in comfort. (Not foam. Quilted.)
Yes it makes a difference. Move it away from the window and try the head against an east wall. We respond to light , it's harder to sleep during the day than at night. East wall keeps the sun off you as long as possible in the morning .
mine is located away from the window I hate the sunlight, it disturb me every morning.so I keep my room dark and cold.
Yes position of bed where is located affects sleep quality.
I dont think so
Like that there is wooden separation behind it or the bed is in front of window.
I sleep always like 6 hours but I do not feel energetic. From years, I feel that my head is crumping or muscle tension, I do not know why and how.
My bed is in front of window and home heater. Boiler "gas" heater, not flame one.