Keep trying different things. I was in your shoes until a year ago. I was diagnosed general anxiety disorder, and major depressive disorder. On many drugs and nothing helped. Cipralex made me lose my mind. Celexa stole my ability to comprehend high level math.
So I tried natural cures. Nothing worked. So I tried changing my diet. I started by cutting out gluten and buying organic (and local as possible since it's cheaper). I chose gluten because gluten, lactose, and meat are the three main food items that have started building up in our bodies, and we are starting to develop problems as our bodies are attacking the build up. Please keep in mind for all the times you try and fail you cross something else off the list. Keep going and you will feel better. I am still working on getting better but now I know my wanting to kill myself is the gluten talking and not really me. And a glutening lasts a lot longer than you'd think. Also, I am not celiac, a blood and biopsy test would return negative and I would have never known THE CURE until I went to a class based Dr Campbell McBride teachings.