There could be a lot of things that are impacting your sleep that are physical and mental. On the physical side of things: sleep apnea. This can be caused by

There could be a lot of things that are impacting your sleep that are physical and mental. On the physical side of things: sleep apnea. This can be caused by enlarged tonsils, enlarged adenoids (if you still have them), deviated septum, and obesity, and probably other things that I don't know about. On the mental side of things: I don't know. Point is that seeing a doctor is probably going to get you better solutions than here.