TENS UNITS! In CVS. I don't know why I didn't realize this was something you could purchase over-the-counter. They weren't even THAT expensive (though we didn't get one today). I suppose because I received treatment in a medical office, and the only other exposure I've had to one is through BDSM, I thought it was something we'd have to order special online.
We're saving our pennies up for something big, but once that's done we need to head back to CVS!