Andy, you sound just like me (and my name is Andy too, and weirdly enough, I dipped Grizzly Mint as well, haha), worried out of your damn mind! Thats why i want to quit....i constantly agonize over every little bump and scratch in my mouth being cancer and how if it is, it could have all been avoided.
As for the nodule, Im definitely not a dentist or doctor, but it sounds like nothing. I got a little nodule on the side of my gums back towards my molars that has been there for years, but like you, every once in a while, i start thinking its getting bigger and start to freak out. Before i know it, ive wasted hours or days worrying about it when all i have to do it quit and be done worrying.
Im only on Day 5 man, but im right there with ya. It sucks and is hard as hell, this morning was certainly the hardest day yet and this weekend is going to fucking suck! However, this website does give you strength in a weird way. If you ever need anything, holler and send me a PM. Have a good one man and keep us informed about the dentist.
'Finger' Nicotine!!!