I am so sorry for your fall and resulting injuries, spaniel. It had to be terribly frightening and painful! Then add a blood clot to all of that, it's difficult to imagine. Was this your op leg? Or your left leg?
As far as shoes go, if you're questioning athletic footwear, I've heard many good things about the Hoka brand, but haven't tried them myself. I've had several different versions of Sketcher slip-ons over the years for when I want a comfy or athletic shoe. I've liked them all. Your OS, PT, or a podiatrist may be your best bet for info to begin your search.
Thankfully you have a loving supportive caregiver in your husband so you're able to be at home. I wish you comfort and hope you'll keep us posted on your progress. We're here for support always.
Your update from today was moved (here) to your original recovery thread and the title changed to reflect your current condition. I will be following your healing journey with interest as I'm sure others will also.
Best wishes for speedy and perfect healing.
@spaniel