I've had the same thoughts on occasion; not that I wanted to unlearn anything, but more the realization that "I can never go home again", metaphorically speaking of course :P

So I guess what I'm trying to say is that you have to find a way to deal with it and move forwards, not backwards. You can't go back to blissful ignorance and forget what you know any more than you can unlearn how to speak English. Perhaps just realizing that you'll never find "it" from reading or thinking about it is a good first step, and then just take it from there.

Whatever you do, it should be practical from now on... that kind of puts the whole overwhelming theoretical aspect of it back to a more subconscious level.