This might be oversharing, but I had the following thought process a few weeks ago in Target.
"The wedding is coming up. Maybe I should buy one of these home teeth-whitening kits. But my friend said that it made her gums really irritated when she tried it for her wedding. Maybe if I did one of these ones with the tray and then tried that tip from Self where I fill the tooth whitening thing with sensodyne after doing the tooth whitening, that will help. But my teeth and gums are already pretty seriously sensitive. This is one of those things you should probably ask a dentist about beforehand. And I'm pretty sure mine would say, 'you already have inflamed gums. Have you been flossing?' But still, I am kind of self conscious about my incisors...but then again, will anybody really see those in photos? Wait, seriously? I'm crazy. Maybe instead I should consider flossing my teeth five times a week like I promised the dentist. And not drinking soda."
My grip on reality was tenuous at best even two weeks ago - I compared it to what the Revers do in Firefly - "operating without core containment". There is no real "track" to your thoughts, they just rattle around in your head and there is no right answer to anything. You bounce from one task to the next and then spend the entire time you are out running errands wondering if you left the iron on this morning when you were ironing the ties for the ushers. (This is why you bought an iron with self-shut-off, sweetie.)
Also, in general, if you don't smoke, your teeth are probably fine. They probably don't sparkle like the people in magazines do, but you know what? You can photoshop those out just like they do.