Hey katie :) I feel your pain, I've been there! Remember it took years for you to get sick enough to feel the need to detoxify, you can't expect your body to heal in a matter of days or weeks. It's been a two-year journey for me, once filled with ups and downs, but it's been so educating. I know when I come out of this, I'll be so much healthier and have so much energy for the rest of my life. It's a process, be patient with yourself and your body. Just stick with it, and it'll pay off ten-fold.
Personally, I seriously craved grains/sugars in the beginning. Now, I don't really want grains at all. I crave fruits, vegetables and raw fats like avaocados and coconut/flax/olive oil. I look forward to them like I did pizza day when I was a pre-teen :) It's all about your body adjusting, you feel bad right now because you're clearing away so much old JUNK. Once that junk is out, you'll feel so much better. But sometimes you have to feel a bit worse in order to feel better.
Keep us updated, and don't lose hope!! It WILL happen!! You really are a butterfly breaking out of your cocoon - it's not easy, but it's worth it.