Did all this happen in one day? If not... perhaps you might be compounding the problem. The past is the past and there is nothing we can do to change it! Try this.... imagine your life as a pathway and that you're walking thru the woods and over a bridge... resist the temptation to look back...look straight ahead... so you can see the sunshine coming thru the trees at the edge of the forest!
*Many situations are like eating an elephant... one bite at a time...
*Have you tried writing things down? Seeing things in black and white has a tendency to make them seem more manageable.
Good luck and take care of yourself.