Hmmm, maybe you need to check your eyes just in case. Isn't it possible that things are not as small as they appear? Or are you looking at the world in a rear view mirror?
...when my late husband first got false teeth, he would say they felt like he had a roll of paper towels in his mouth...Ha !.I don't know why this happens, but it's not altogether a bad thing
Maybe you swallowed a magnifying glass when you were younger and it’s now become part of your vision making things in your mouth appear larger when inserted in. Like food and such…. Or is it those braces you had taken out.