Today I went from $2200$ to $2194$. I checked the reputation tab on my profile and there was nothing there to indicate the loss. Is there any way to see why I lost this reputation?
A reputation recalc was triggered on your account when you deleted one of your answers. That is why the change showed up now.
I however do not know why your reputation display is out of sync with your actual reputation. But just to throw in some possibilities: while deletion and undeletion of your own posts should trigger recalcs, so should not contribute to this. But there are a couple other things that come to mind (that I don't know for sure whether they trigger recalcs)
- Deletion/undeletion of posts you have downvoted
- Deletion/undeletion of posts you have proposed edits to
I counted three instances of the second possibility in your history (between December 11, the previous time a rep recalc was triggered and today), which would result in a reduction of 6 points. But this is only a guess, so take it with a grain of salt.
It is possible that a post you have downvoted in the past got undeleted.
I experienced a similar case recently and I managed to slowly trace it back to that undeletion.