More sleep, more pain?

I have alot of back problems, mainly a pars defect on L5 and i had a pretty bad fall down some stairs on new years eve this past year. Ive started to notice the longer i sleep in the more pain i have. i wake up felling like i was beat up in the middle of the night! also we just bought a high quality mattress in feb. so i know its not that and i get plenty of sleep! i will be seeing my doctor next week but any suggestions now would be appreciated. thanks :)