I'm very glad you went to the E.R. and got antibiotics and a tetanus shot. I've no idea what to suggest for the pain and I imagine it hurts like merry hell. Like you, I drive a stick-shift, and I remember once driving myself with blood running down my arm (major slash, not bite) and my hand sliding and sticking to the steering wheel and stick. How on earth are you managing to look after the cats one-handed? I also had a cat turn on me, though he only tore my arm into shreds, didn't bite. As with Ally, he was lying in my arms as I stroked him, totally relaxed and purring, and the next second he'd latched onto my whole lower arm, digging in and tearing me up. I imagine these instances are deferred aggression, where a cat that becomes over-stimulated quite easily is also angry at another cat and suddenly takes it out on the human responsible.

I hope you are able to sleep in spite of the pain.