Am I masturbating too much?

I have been masturbating for 3 years now pretty much every 1-2 days, is this good for you? I have noticed I find it quite hard to concentrate and I am quite forgetful I also have problems with being tired alot and I tend to oversleep (1am to 1pm) , I have heard these are symtoms of over masturbation. I could completely stop but I dont know if thats a good idea, and I am getting alot of spots on back and chest and some on face, could anyone tell me if these are all caused by over-masturbating? And if it is what I should do to recover.