So very sorry to hear of your loss. We lost everything, too, years ago in a fire. DH just barely got out. I understand your feelings of loss and I want you to know that it is OK!!!! Allow yourself to rejoice in finding little things, even if they are damaged.
Some practical advice: get a big notebook and write down everything. Kind gestures, gifts, thing to remember, things not to forget to do, borrowed items, addresses..... Very soon it will all start to overwhelm you and you will forget something that you want to remember forever. I still have my notebook and I still can't belive the kind gestures and gifts. I will never forget my friends bringing their lawn furniture into our quickly rented apartment in the middle of a snow storm (in December). The love and caring made those chairs the most comfortable ones we have ever used!
But most of all, keep in touch with us and know that we care.