I am so sorry to hear about your situation.

A couple weeks after the bomb, I told a few co-workers, whom I knew wouldn't broadcast the news. Then a couple weeks later I told my boss. He was very understanding and said if I needed to take some time off I could. I told him I didnt want to take time off because the work seemed to keep me focused. This is something that in my opinion really helped. I know where you are right now, I was there. At first I had to motivate myself everyday to do something, gradually it became easier. I took on a few projects here and there. It really helped me, and I think it may help you. Start off small, if it helps make a list of the things you want to accomplish for the day, at the end of the day mark the completed items and feel good about what you have done.
Heck there are still people here at work who dont know I'm divorced. If they bring it up, I just say I'm no longer married and thats about it.
As far as time off goes, I did stuff on the weekends. I would go camping/fishing/skiing/visit a relative whatever. Figure out what you would like to do and make it happen. I told myself that I wouldnt take vacation to sit around the house and mope about her leaving me. There is plenty of time in the evening after work for that. Its important to deal with your feelings, but dont let them consume you and your life. Focus on taking care of yourself.
You sound like a smart, strong and accomplished woman. Now is the time to be strong. I know you can do this.
My 2cents, I hope some of this helps.

Hope