I think the tetanus shot does include thimerosal, at least in general. You may want to do a search online to see if there are doctors providing one without it.

The last tetanus I had was at 15. I was due to have one a couple of years ago, but after reading on the internet that some people had problems after the shot I decided to cancel my appointment. I thought the problems were from the tetanus, but now I think it could have been the mercury? i.e. some of the problems were neurological.

I know that doesn't really help you any.