Yeah for short walks!. Being weightbearing is going to help a lot of things. I am pleased to see the redness is only in the area of rash. That is really positive. I thought you meant your whole foot!
If you're trying antifungal hit it hard. Twice a day and rub it in not on. It's worth a try. You've had skin covered up with bandages and ointments for a while now.
Venous dermatitis is certainly an option. Just think what those tissues have been through lately. The tiny capillaries responsible for micro-circulation in the skin get damaged easily and you just had new ones form in that wound.
It sounds like you had a big ramp up in activity this week. I am so glad to hear you are getting around. I know you're loving it!
Take care,