Bethann: I'm a BIG proponent of getting either/both of the Reboot with Joe smart phone app and book (of the same title). There is a 30 day Reboot plan in there. In it you'll see that there is a menu for each day and, most importantly, you eat solid food during the first 5 days of the 30 day plan. It's things like blended soups, acorn squash stuffed with mushrooms, and a GIANT salad (among other tasty meals). By dong a 5 day transition, following the 30 day juicing plan, I didn't suffer the fatigue/headaches/fogginess that others complain about.
I just don't know how people can jump right in and go from eating anything/everything to nothing but juice. Kudos to those that can do it and be successful, but I don't think I'd have made it this far (Day 19 of 30) without transitioning into a complete juice diet. But I'll let you in on a dirty little secret: You're not failing at juicing if you treat yourself to something 100% vegetable in nature. In the Reboot with Joe book, there's a recipe for sauteed greens with garlic. I've had that probably 3 times over the last 19 days (1 time when it was on the menu, 2 times because it just sounded good and I wanted it). I'm down almost 15 pounds. Do you think I think that's ruining my diet? Nope. My scale doesn't think so either. Nor do my saggy pants. =)
Another bit of advice: Think about this as what you're giving your body versus thinking about what you can't have. I'll bet you a dollar to a donut (pun intended) that you only think you're having a break down because you're thinking in terms of "What I can't have", versus what you can have.
Joe's book also talks about having an extra juice if you're hungry or if you're working out. Listen, if you're like me, you're probably going from a 2,000+ calorie day down to a 1,000 calorie day, and in your instance, literally overnight. Throw the physical exertion of a workout and probably down to 600-700 calories after the deduction of calories due to a workout. What does Joe's book recommend? Buying 100% coconut water and a canister of vegetable-based protein powder. Between the coconut water AND the scoop of protein powder, you're ingesting 200 calories. So 6 juices a day (remember it's okay to have an extra juice to stave off hunger) at 175 calories plus 200 for coconut-protein water and you're going to be in a GREAT place!
I hope this information helps. I've found this juicing to be a God-send for me and I want you to be just as successful! =)