I understand why you feel the way you do. I would probably feel that way too.
How did you pick yourself up after the first bomb?
Greek had some great suggestions. Stay busy and do something for someone else. One of my tricks was to make myslef talk to someone who I saw during my day who was a stranger. It really helped me.
You're probably already exercising. If not, throw yourself into that. Getting back in shape helps the self confidence.
Get your mind occupied. You've been at this long enough to know what to do.