There was a study in the UK on two groups of people suffering from depression. The first group were given standard anti-depressants, and the second group were given placebos, but the second group were ALSO taken outside, as a group, and walked briskly for 2 miles every day.
At the end of the study, it was the second group who reported the most improvement with their depression.
In other words, the anti-depressants don't do diddly squat for you. You might want to consider slowly weaning yourself off of them.
Buy some vitamin D3 with K2, and start taking it every day. Every time you have even a TINY bit of ability to leave your house, hit the sidewalk and start walking. Exposure to the sun is a great cure all, AND walking helps with your circulation and with getting oxygen to your brain and all your body parts.