@Gummy Bears and
@Liznwiz
Thanks for your well-wishes for this day!!
Well, I can officially say that I overdid it.
Yesterday, I felt really good walking on our block and walked about 0.3 miles. So today, I thought, "Why not walk to the haircut?" It's only 0.3 miles...what's the worst that could happen? Abandon the plan mid-walk and Uber a taxi? Against your good advice and my own inner voice of caution I decided to walk.
Let me first say that nothing bad happened. My son walked with me all the way, and I got there in one piece. It took me about half an hour to walk that distance with the crutches, though, and by the time I got there I was hot and a little bit shaky. My stylist was great. She plied me with water (offered me wine, but that didn't seem like a good idea mid-day) and put my leg up on a stool.
By the end, though, I was really concerned that I had depleted the energy tank all the way, and I still had an interview to go!
Got home by taxi (a pathetically short ride in a Prius which was a little bit uncomfortable and awkward to climb into and out of) and iced with my leg up for an hour. Then Ubered a cab to get to my interview. Thank goodness a handicapped accessible mini-van showed up. I could have wept for joy. Oh, the leg-room!
The interview went well.

Two hours later, my leg was a little sore and swollen from sitting, but no major pain.
Made it out to a corner where traffic should have been free-flowing, but NO, there was some kind of race / walk in lower Manhattan that had streets blocked off. This is the point where I found myself on the verge of tears in public. Lucky for me, my husband had driven over and had found a place to park while waiting for me that was about three blocks away. I made it - slowly - to where he was. As luck would have it, this was my second walk up a slight hill in one day. On the way, I decided that there is a special place in hell for people who don't give way on the sidewalk for someone on crutches. So what if they're on a fundraising run in the financial district? MOVE OVER.
I'm certain that today is one of the activity days that
@Jaycey pointed out.

I plan not to move more than I absolutely have to tomorrow!