What Sandy said. Now is NOT the time to get on a bender, it can and likely will be used against you.
You have kids and property and a PENSION. Property can be divided, the kids can't. You need competant legal advice then FOLLOW IT!!!!! If you want to retire and be able to live or enjoy your pension you need to work to protect it NOW!!! Get the Lawyer ASAP.
Cancel EVERY credit card you both have, NOW today. Sign up for your own bank account and have your check direct deposited to it ASAP. Lock every joint account you have and pull your half of savings now or it will be gone. Remember your wife has had this on her mind for some time so she may have already taken steps to clean you out. She wants out so tell her she can leave, but the kids stay. GET LEGAL ADVICE NOW!!!
You are in for a big fight if you want to maintain a relationship with your kids. The kids are now your #1 priority to protect what you have wth them and to maintain contact.
FWIW, the pain will ease, it will take time. Later on, should you do things right, you may find that this was a big boost to the rest of your life. There is life after divorce.
PM me if you need to talk.