SO unbelievably sorry to hear that.
I cannot express my deepest condolances becouse I had the same, stressfull moment few months ago.
I wasnt even able to 'escort' it properly. It was clandestine operation in the cover of night.
Dont be surprised with many flashbacks and turnovers in your mood, after many daylights gone.
But then again, try to set mirror image in most situations that your PomPom existed...when you set eyes on other pets, locations etc. It helped me. Dont bother with fact that ppl will observe you as remoted freak with absent look, without knowing your daydreaming & projecting omnipresent PomPom.
Stay strong pls