I think you're doing great! I'm impressed by how much you've cut down already. I'm really sorry if I came across as condescending.
I'm glad that you don't have a headache. I remember when I stopped drinking sodas; I used to drink at least two bottles of Mountain Dew a day, and the withdrawal migraines I got from not having the caffeine were excruciating for a few months (I foolishly quit cold-turkey). I really hope you start to feel better soon.
Maybe you should try different medications? I'm really sorry your so miserable. (((hugs)))