I'm with wiretwister... You can't make anyone else happy but yourself.
You need to be well first in order to give your children what they need.
Perhaps what you need right now is to be alone.
Step out by yourself, buy yourself a nice new shirt or outfit. Cruise the mall and window-shop, slowly and leisurely. Don't rush for anyone or anything. Go out for a meal by yourself, take your time. Go to the movies.
I hope you feel better soon.