You aren't alone in this thing. I've had songs stuck for days in my head. When I was young and in hospital I thought it was a sign of me going crazy, until a nurse explained everyone gets earworms now and then. But a while back, I'd have a song in my head going to sleep, and woke up with the darn thing repeating, must have done that all night? Now that's weird. I wish you the best, hope it goes away on its own.