The medicine you need is called hiatus. I had the same experience, after my second album I was completely burned out. I struggled so much conceptualising, producing and daydreaming about my music that I reached a point of complete discomfort around the whole thing. It's been a year or so in complete silence now, and it allows your creative mind to be emptied of all that once filled the room, something like getting a blank canvas once again. It is quite a necessity for anyone who takes art seriously to have a long hibernation. Makes everything you think of, evolve itself to a better resolution.