ChestCountMod

Every time you open a chest, the mod displays the amount of chests you have opened this session and your total chestcount.

You can alse see how many chests dry you are

With the command /lastmythic you can see info about the last mythic you found. The info includes the type of mythic and level range, it also includes your chestcount when you found the mythic and how many chests dry you were. It tells you the coordinates of the chest and also how many chests dry you are currently

You can change your settings with /chestcountconfig or /ccc

Do you have negative dry or inaccurate chestcount?

Make sure you have chestcountmod version 1.3 or higher

You can manually modify your drycount by going to .minecraft/chestcountmod/dryCount.json

and changing the value found after your UUID.

You can find your accurate drycount by taking the sum of all chests looted found in the top right of the tome menu. The total chestcount is calculated by taking the chestcount of your last mythic + your drycount, so you can adjust your drycount accordingly and then restart your game.