I am so sorry to hear of your troubles, earlier on in the Academic year I read your post and thought you were one of the bravest people I know. Why dont you read through your old posts and remember how it was then, this is only a blip and you will come back up again. I know this has helped me during my low times.
Make a list of all that is going wrong and concentrate on the fixable ones,such as your meds, others hopefully will take care of themselves.
You have so much to offer pupils keep battling on, best of luck.