Depression and anxiety definitely go hand in hand for most people.
A few things that my therapist suggested & that worked for me:
1. Keep your regular eating and workout routine. Your body needs good food & a stress release. Especially if your body is used to having an hour's worth of exercise and suddenly that is gone, you've lost your stress release that your body is used to. My friend's therapist told her that during extreme episodes of anxiety,l she should only do cardio and not weights because the lactic acid tends to cause you to tighten up and be more tense. I don't know now much truth that holds but it's a piece of information for what it's worth.
2. Make a list of daily goals, including easy ones, and strive to reach them each day. I put my workout, packing lunch, teaching class, etc. on my list so that I feel accomplished for every thing that I do. Be realistic and focus only on the list and not things outside of it.
3. Try to figure out what it is that is giving you anxiety and break it down into easy steps so that you can work on it. If it is making a decision, then perhaps make a list of pros and cons one day, talk it out with a good friend on another, contemplate on another, etc.
4. Perhaps see a therapist to help you organize your thoughts a little, have an outlet and/or make a plan of attack. A lot of times, having anxiety and/or depression is a little bit about feeling out of control or not knowing what to do about a decision, action, etc.
5. For sleep, try to stay away with no naps until it is time for bed. Don't watch tv in bed when it is time to go to bed. When I can't sleep, sometimes I try to stay up an hour or so later just to tire myself out. Before bed, do the things that help you relax. Shower, bath, tea, stretch, etc. Really take some extra time to bring yourself down and put all of your worries away for the night.
It sucks, I know. It will pass and you will work things out.
Good luck