Well, get it checked out to make sure it's ok.
I did not get such a bump at 18... So 35 years or so later here I am, 173 days quit.
Flush all tobacco down the toilet if you haven't yet.
go to the February 2016 quit group and post roll, your promise to use no nicotine for 24 hours. Nrepeat every morning. Exchange digits with to other bad ass quitters in February,mthey are newly quit like you, some are near your age.
Read everything here, use live chat, join the February groupme.
Drink water and exercise.
Take the hint from your mouth and get nicotine out of your life. Get that bump looked at -- no point worrying without info. And dive in and quit!