It's hard to loose our pets. Thankfully you were in there lives to provide everything and make them the happiest pets while they are here. Getting a new puppy is a huge decision and only one you can make on your own. Some people that loose pets never get over the death of there beloved. Some feel the need to get another pet right away after and some people feel the need to get a pet before the elderly pet passes. It is all up to you. You have to know what's best for you.
I wish you all the best. You are in my prayers.