aw I'm sorry you have to go through this- I feel your pain. I went through the same thing with Chibi. It took forever to figure out it was allergies!
Good news is once you get on a food/washing regiment and your past the initial flare up it does get better. I also put probiotics in their food, the vet said it helps with overall health and you can get it over the counter. It will get better, stick in there, Chibi (knock on wood) hasn't had any flare ups or had to even go to the vet in a while, we found a good regiment that works for us and just stuck to it
good luck!