Will found this article about tonsil stones this morning. Upon reading it, I had an a-ha moment. I get those gross things.
Sometime last summer my throat was sore, and while waiting at a stop light, I looked at my tonsils like I often do, hoping it wasn't turning into strep throat. On my right tonsil there was a whitish patch. When I got home I pushed on the tonsil, and it popped out. I swiped it off of my tonsil with a cotton swab, and looked at it. I pressed on it with my thumb and forefinger, and it wasn't hard although it had felt hard in my tonsil. I didn't think anything more of it and went on my merry way.
Months later if happened again. No big deal, I cleaned them (there were three this time) out. Done with it. I am almost positive that I had them three times in the past year.
Interesting, but not problematic.