New Beginnings

My life is changing.  My head is spinning from the speed at which that change is happening.  I am fourty, almost fourty one years old and I am starting over.  My husband wants to start over, I'll never know exactly why, but he wants a change, a new beginning for himself.  My long, beautiful marriage will be coming to an end in a few months, after we deal with the house and the lawyer and all that.  Then I have to pick myself up, clean myself off, and start a new life.  How am I going to do that?  At this point I can't go a day without crying my eyes out.  I don't know how to start over.  We have been together almost 15 years.  By far the best years of my sorry excuse for a life.  The loss I am feeling right now is overwhelming.  How do I do this?