The 50/50 chance is just from reading articles online... I know goolging is terrible to do but I usually will google odds and stuff with the intention of finding some information that will make me feel better, but in the end it always just makes me feel worse! My parents like to be very involved in every aspect of my cancer... it gets pretty old... but I never feel comfortable asking the doctor questions like what are my chances of recurrence, because I try not to upset them and don't want them to think I am depressed or anything. I have finally moved back to Atlanta though, away from my parents, so I will have a chance to go to doctors appointments by myself now and ask them questions that are really on my mind. Not that anyone knows whether you will have a recurrence!
As far as the mouthwash, I did switch to non-alcoholic mouthwash immediately after my diagnosis. So I have been conscious of what I eat and drink... unfortunately it still has not stopped me from eating sugar, but I love sweets and will take the risk! I try to stay away from processed foods, though. I have become pretty much a hypochondriac since this whole cancer thing, so hopefully if it ever does come back I will be able to catch it quick!