I quit counting years ago after about 100...avg probably 1 per month since then...conservative estimate.
Some put you in fetal position, some make you throw up, some make you feel exactly like someone said about getting kicked in the nuts, etc...some are just uncomfortable.
Once you have one...you will always know it.
Only way to know for sure is to get a scan.
As to how long it takes to pass...depends. I have had some thathave taken 2 weeks of pretty much continual pain...doc told me one was small enough to pass....I cursed him when I spit out what looked to be a #2 pencil eraser.
Don't mess around with it if it continues...not common...but they can block a kidney and also cause severe infection.
This post was edited on 2/18 at 6:03 pm