Remember that the only way to move beyond your depression, anxiety, etc is to think differently. You can pick a big long treatment method that may eventually cause you to behave in a productive manner if you follow it... but that's just punishing yourself by putting off your relief. Your depression is merely a habit, and if you don't like it, it's a bad habit. You break a bad habit by simply not doing it, and doing something positive instead.
Regardless of why it happens, what you allow yourself to become absorbed in is your own choice. I've met people with severe depression who are not depressed; Severe anxiety who are not anxious... Negative thoughts and feelings occur to them (often all the time), but they simply choose not to become rapt in these thoughts and feelings, and go about their business as they choose. Hell, I've met a paranoid schizophrenic who handled it the same way and exhibited no symptoms other than to herself... she is still a healthy, happy and stable woman last I heard, and doing quite well.
You don't become your urge to urinate, do you? You don't lose all control when you see a sexually attractive woman, do you? Well there's no reason you should become anxious or depressed just because you feel these things. This is just a weakness of will, you are much stronger than to allow this to happen (I assume you can use a toilet properly as well).
These feelings are not you, they are happening as/to a part of you. Just keep in mind that you are not these feelings and are perfectly well able to separate yourself and go on about your business as you wish. If you wind this hard to do, I would suggest some awareness meditation. Alan Watts is the man if you need some insight.
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For detox, etc... the game is pretty simple. Eat properly, getting enough fuel and nutrients to allow your body to do its job. Keep it as natural as possible, and avoid foods and drugs that alter your body's normal function, such as sugar, drugs, omega-6 fats (feedlot meats, etc), and anything else that doesn't seem purely beneficial and wholesome.. (la dietta-esque, if you want to get all newage with it). Comfortably stretch enough to relax your muscles, exercise enough to allow them to reshape into a healthy system, make an effort to clear your mind of the thought structures you live within (live free of your or any others' rules), make sure you are in a comfortable, healthy environment, and drink around a gallon of water throughout the day... While doing all of that, learn about yourself, your condition, and most importantly... take the time and effort to get a good handle on who you are (DMT ego-death helps if it doesn't rattle your brain too much) and how you must change your behavior in order to live your life the way you want to. Chances are, it won't be too drastic. And then... Change your behavior in order to live your life the way you want to. Godspeed.