It sounds not like some potential toxicity, but rather strong allergic reaction. You can look at Auto Immune field, also antioxidant ones, https://forum.enlightenedstates.com/t/pathogenic-cleanse-protocol-patreon/93815
Try taking Cetirizine 10mg once a day for couple of days, if it helps, continue for a week or two, it should be OTC in most places.
Also it might be, but unlikely some bacterial or viral infection from the place as it was unsanitary, it sounds more as an allergy provoked.