Just got the biopsy report from the dermatologist.
The spot was indeed a squamous cell cancer, but it is all gone now.
It's a good thing I got the whole thing removed with a punch biopsy instead of taking a sliver and having to return to get the rest off. It's also a good thing that I noticed it quickly and called, because I had just been looked over a couple of weeks earlier and it wasn't there.
Looking at yourself too closely can have its drawbacks, but it has benefits too.