I got a recluse bite on my calf while serving in the US Army in West Germany in the late 70s. That spider is not native to Europe so it had to have hitched a ride in my possessions or somebody else's to be present to bite me. The PA in the battalion medical clinic knew immediately what it was and started a regimen of oral antibiotics, wound treatment with debriding by hydrogen peroxide, antiseptic soap cleaning, application of topical antibiotic cream with a bandage. Good luck with your treatment!