So sorry about your dog. I'm a big dog lover and mine have actually helped me through some of this crazy stuff.
As for the mind movies, other vets on the site will tell you that they do lessen with time. Your D-Day was less than a month ago. I was there myself a while ago, and they did ease up, but it took more than a month. Unfortunately, there's just no off switch, damn, there's not even a pause button.
You've been dealing with so many horrific circumstances in your life aside from the A, you must be a very strong person. Stay strong now, I'm keeping you in my thoughts and sending you hugs.