So I've just managed to cut my leg on my bike. Chain came off and as I was getting off the spiky bit the chain sits on went into my leg. It's a small gash but quite deep and bled q bit. Am worried as the metal is fairly rusty. Have cleaned it up and put a dressing on but wondering if I need a tetanus shot? Had my last one around 15 years ago. Wouldn't be able to get to the doctors until Tuesday. If I need one should it be sooner?
TIA