Can this be healed by natural remedies?

I suffer from pain in the lower, left part of the colon, and also some on the right lower part of the colon. Burning, radiating sensation. Horrible! I got this from straining when I had constipation. (stupid)
I believe that I suffer from diverticulits (spell?.)

Can this be healed naturally, without Antibiotics or surgery? And by surgery, to they remover large parts of the colon so that you have to have your BMs "artificially" in a bag attached to you tummy, or to they just remove the pockets?

I only eat fresh, mostly raw veggies, and juices. But it doesnt seem to improve the situation at all.

Has anyone had any succes trying to heal naturally?

Desperate! :(