A Brown Recluse bite will make itself obvious as the wound progresses. Been there, done that, got the T-shirt. The bite wound will become red in a circular fashion. the skin will become necrotic and start to sluff off leaving a deep volcano looking hole. If you catch it in time, antibiotics can stop it. It took MONTHS for my wound to heal and I was at the Doc about 3 days after the initial suspected bite time.
You definitely got nailed by something nasty though!
Spiders are icky.
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