Gosh, that sounds hard. With regards to the extreme tiredness, I have been drinking fresh vege juice every day and it's made an incredible difference to my energy levels. It does require your own juicer, but if you don't have one and can afford it, it's a great investment.
If you are used to a lot of caffeine on a daily basis you could try weaning(?) I've given up coffee on several occasions and just having one mouthful on the first day of abstinence put a stop to withdrawals (I hope this doesn't count as medical advice!)
Re the extreme depression, I would suggest seeing a doctor. I did about two months ago, was put on medication, and I cannot believe the difference. No kidding. Good luck and hang in there. Hugs.