Both xanax and prozac zaps energy and makes you lethargic. Have you tried another anti-depressant? Also, there are some anti-depressants that are also anti-anxiety so you don't have to take so much stuff.
But no medication substitutes good therapy. Hope you have a good therapist to help you. Behavioral-cognitive therapy is what helped me the most.
Just a thought. Hope all goes well for you.