>>1
Wait a few days. If it starts turning black and smells nasty, then:
1. If you live in a real civilization and you have socialized medicine, go to the doctor and get help.
2. If you live in the USA, just cut it off with a knife on the way to and from one of your 3 part-time jobs. Jam a bit of tissue paper (that you got from work) onto the stubbed tip to staunch the bleeding. Doctor? I'm sorry, did you just say "see a doctor"? HAAAA HA HAAAA HA HAAAA! You must have mistakenly thought that you lived in a REAL civilization. Just get the knife, make the cut, and STFU before your boss sees you and fires you for your self-sufficiency.