Hey,
Like everyone else has already said get a Tetanus shot first,
If you start to lose any feeling/it feel funny in the foot then go to your doctors, if your unable to do that go to a walk in medical Center. make sure you change the bandages daily or as needed, try to keep it clean so it doesn't become infected.
If it does become Infected go to your doctors or A&E (some signs = redness,swollen, smells, becomes painful) make sure you go before you get septicaemia (blood poisoning) or you will end up in hospital on a IV drip for 2 weeks or worse
Dan.