Oh no! So sorry to hear about your foot!
And that at a time when you're home by yourself with the kids, what a nightmare!
My boss tore his achilles tendon a couple of years ago, it took quite a while to all heal up. At least it will give you time for knitting, but ... Ack! So sorry!
I hope your surgery goes well and that the time until DH is home safely won't get too long.