Re: Tetanus injections...know anything?
It does sound like a typical reaction to a vaccine.
I don't know what work your DF does but tetanus isn't needed nearly as often medics would have us think. A country hospital tried to give DD2 tetanus a few months ago when she got a big swelling on her eyelid and her back from mosquito bites!
Tetanus cannot live in the presence of air, so where a wound is open or shallow it is usually fine to leave it uncovered and then tetanus cannot take over. Deep or closed wounds, such as bad cat scratches are more susceptible. A few years ago I chopped the top of my thumb off with a large kitchen knife and I was offered tetanus (do they REALLY believe my kitchen knife has tetanus on it?!!) and I declined saying I would uncover it as soon as I could/the bleeding had stopped. I didn't see any point in me dealing with the side-effects of the vaccination when it was so easy to avoid the infection with a wound like that.
HTH