Katie
What you really need to do is work on the depression. I have phases where I get really depressed, always worried and sad, and that's when I get sick. Depression can cause more problems than you need. Try to find one thing everyday to make your self happy. Do a facial or paint your nails. Something that makes you feel like you've made an improvement. Even it's little. Unfortunately, I'm not a doctor, but I know about depression and it can hurt you more than you think, even on the inside. I wish you so much luck and keep your chin up!