question: we recently tore down an old shed in our backyard.  while moving pieces of wood across the yard i stepped on a nail in one of the boards.  some of the nails are rusty and some are not, i do not know which one i stepped on.  there was barely a prick on the bottom of my foot.  hardly any bleeding i almost didnt realize there was blood.  i cleaned my foot and doused it in peroxide, and put a band-aid on it.   i am 21, female, approx 250 lbs and have no clue if i have recieved a tetnus shot in the past 10 years.  what should i do?