Sulfamethoxazole and ants

Nothing short of nightmarish. 10 minutes after I took a pill, I experienced extreme itchiness which escalated to a sense of being eaten alive by red fiery ants. Every nerve in my body seemed to be pricked with painful needles, my scalp, inside my ears, torso and worse in hands, ankles and feet.No visible rash appeared but my temperature dropped to 97, my throat felt tight and after 10 hours, while much better from benadryl, predinsone and countless warm showers, I am still feeling the ants and needles and an acute sense of anxiety.