I'm sorry that you've been dealt such a blow Jezzer, you must be in a state of absolute shock.
There are no easy answers, but as Dustydog mentioned, take time to think and don't do anything as an instant reaction.
Seek good financial advice and enlist the support of friends and family to help you at such an emotionally unstable time.
It will be of no consolation to you whatsoever, but I also faced a similar situation after 16 years of marriage and 3 children.
It was an extremely difficult time, but after the initial pain and hurt I rebuilt my life, slowly regained my self esteem which had taken a hammering, and I'm supremely happy and content these days.
We're not experts on human relations here on this forum, but there's a wide spectrum of life experience here if you need to draw from it.
Even if you need to unload, contact any of us via the private messaging service, sometimes it's cathartic to get it off your chest by writing it down.
Good luck, and take your time.