When really depressed the high doesn't happen for me either, but I noticed my depression was less severe if I exercised regularly.

I also had some anxiety initially, but I would ask myself, "Who are these people and what reason do I have to care what they think about me?"

I recommend walking at a park if you can, get some sunlight and fresh air. If that's too much effort just go out of the house and walk. If even that is too much do jumping jacks, situps, running in place, pushups, or yoga, or whatever is physically demanding for you so that it raises heartrate, and do it for about thirty minutes or more.