Welcome to the forum!
Sorry to read about your troubles. It could be that the lens has gotten something on it (like dirt or hair) that is preventing it from being able to read the discs. There are a few ways to clean those lenses. You can get a special disc that cleans it, you can clean the lens yourself by taking the unit apart enough to see the lens, or you could probably just open up the disc drawer and blow compressed air or even a hair dryer across there in an attempt to clean off the lens.
There are others here who know more about this than I do.