Sugar - it would help me to keep telling myself that I never had to feel that way again. Once I accepted the fact that I was going to have to go through the pain it made it easier to bear. You have done this before and will get through it again. Have you tried getting in a hot bath? That was one of the few things that made it tolerable for me.
Keep on going. You don't have anything to turn back to. It will only be worse the next time if you do turn back.