Swelling seems about the same to me. Slightly concerning is that it looks a bit like I'm starting to accumulate water in my left foot.
The rash doesn't seem any worse, and I'm not sure, but maybe it isn't itching as much.
One suggestion in the comments has been that this is possibly a tick bite, which makes Lyme Disease a possibility. They did not take a blood test or a lab culture to test for it; however, checking the CDC web site on this subject, the suggested treatment is exactly the same type of antibiotics I was prescribed. Also, I'm not showing any of the other symptoms other than the rash, so I remain cautiously optimistic.