That's horrible news Gary, but it's not the end of the world. Inspiration is a weird thing that seems to come and go.
If you still have a love for music, then one day you'll feel like picking it up again. Try not to put pressure on yourself about it though.
I know what you mean about "thinking about it". It takes alot of energy, and sometimes this is a problem in other areas of life - just ask my wife.
Good luck mate.