Welcome to PT (sorry for the circumstances).
My condolences on the loss of your beloved pom.
I lost my 13 yr old rottie Angus almost a year ago now and the pain is still devistating if I think too hard about him.
For now just grieve and try to remember all the good times you had together & cry. Cry for the good times and the bad. Try to remember every minute you had together.
I recently started a scrapbook. I think it's helped me remember the good times better than just in my thoughts.
I wish I could help more, but I know I can't. The healing process is your alone and I'm sure after time the pain will lessen.
Take care.
Anna