I'm sorry you are going through this. It is so painful and the best medicine we can really give you is to say that it will get easier. It will, I promise, but I know that is cold comfort.
Beyond that I give you what little advice I can. It really comes down to two things, really just one, gather your wits. This can be done two ways. First, realize that two lives that spent 34 years coming together, can't be torn apart over night. What ever happens, it will take a long time. My 4 year marriage, has taken a year to end, and it really isn't over. Embrace the time knowing that he isn't going anywhere; at least not fast. I know it is easier said than done, but it can be. Next, set a goal. For me it was exercise. I cannot stress enough how good this has been for me. For you, maybe it is something else, but find a goal (art, music, reading, running, dancing, anything) and achieve it. You will feel good about yourself, and when one does that, the battle is half over.
Good luck and god speed.
M:37 W:34 M:4 years T:6 years No Kids A disclosed - 9/1/2010 W asks for separation - 10/19/2010 Moving on - 10/24/2010 A ends (and I believe her) - 12/2010 Content - 3/1/2011 Served - 3/18/2011 D Day - 6/20/2011