I know first hand exactly the emotions you are feeling and this experience is beyond understanding.
IMO, do not do anything. No response is necessary. After all, what is there to say right now?
Let your H file his papers, be served. Get a lawyer (if you do not already have one picked out, if you do retain their services) once you see the papers.
In regards to H's belongings, do not help him. Let him come to you to get them. Make him do the work if he really wants them. However, do not try and stop him if he schedules a time that works for you. Do not let him in the house without your watching him. When he leaves ask for his keys.
Remember, a divorce takes time (in most states). Time is on your side and it isn't over til it's over.
I am sorry you are feeling and going through this experience.
(((Irish)))
Sanderika
ME48/H48MLC T 33y M 28y S16 OW 8/7/05 Bomb 8/16/05 Sep 9/05 H f'd D 10/3/08 D pp'd 1/20/09,7/24/09,12/4/09 D dismissed 2/5/10 H served me D papers again 9/4/10 D dismissed 9/26/11