Tetanus is very serious, and believe me you dont want to get it, they used to call it LOCKJAW so maybe that explains it all, the shot is no big deal, i hate them too, but i had to have one and it was nothing, really, my arm did ache a little for a day or so afterwards, but thats a normal reaction that not everyone gets, i had it done in the opposite arm to the bite, which was a mistake i think because both arms then ached. boo hoo.
Yes every ten yrs is recommended now, used to be 20, but they have changed it, anyhow dont worry its a little prick and thats it, compared to LOCKJAW its a small price to pay cheers.