Holy smokes, that sounds horrible. I thought the one I got last year on my ankle was bad. You had lemons and golf balls! If you google images of the bites, that is some gross looking stuff. Glad you sought medical attention and got yourself fixed up.
A friend of mine had a nasty sting ray incident which caused tissue damage to a large portion of his lower right leg. He got a tattoo of a stingray, with some strategically placed coral on the spot to camouflage the tissue damage. Are you the tattoo kind of guy?
Take care of yourself and keep spraying the house. Kids and pets don't know what BR spiders look like.