Glad to see you took care of it, MA. A BR bite can kill human tissue if left alone.
Now, Edgar posted a picture of a Brown Recluse. You can identify them easily by the upside down fiddle on their bodies.
By the way, they love cardboard boxes, attics, and shoes. And any dark, quiet place. If they've moved out to where you're at, that might mean you have an infestation. If you were bitten by one, that means there's a lot more of them crawling about.
Time to call an exterminator.
Besides insecticides, glue traps along the floor boards work well catching them.