Thank you for your post and I am sorry for the loss of your beautiful dog Gus. Everyone’s timelines for grief are unique and the waves can come in different moments and from different triggers. hope that things do become a bit easier for you over time and this question ”does it get easier?” is such a normal response to grief as it is in these times that we really need hope that it does as the pain can be so intense. As you will already know, everyone copes with grief their own ways. Personally, I’ve found Lois Tonkin’s work and images helpful in the idea that we grow bigger around our grief – https://whatsyourgrief.com/growing-around-grief/
Also, this article on Coping with the Coulda, Woulda, Shouldas might be of some support – https://whatsyourgrief.com/guilt-and-grief-2/
All the best to you and take care when you come home and in the days and times ahead.