Noah, your situation is different. You have an illness that did begin with a snake bite. All the rest might be adding to your depression, but it is not the cause. From what I know of you if you were not this ill you would be up and going. Every once and a while you get down and let lose with a little depressed talk. That's okay because then your fine, even though things are still bad. You let lose some poison and then improve. That's what talking is meant to do, but if there is no improvement then it is not helping.
Keep going Noah, were routing for you.