Yeah, you've done amazingly. If you do it a second time, it gets considerably easier. I'm going into day 10 of my latest, and it's been a breeze on the whole. The beginning's hard, then it gets better quite quickly. Your beginning just lasted a very long time.
Listen to your body. It'll tell you when you need to stop. It's important, I think, to separate cravings from hunger. I have neither right now. Bt the moment I feel hunger is when I'll start coming off it.