Many years ago I quit coffee cold turkey. My experience was very different from yours. It is a bit of a long story that I probably shouldn't tell here. The short version: I was a ten-cup-a-day or more person. My daughter was a grad student in psychology who one evening decided that her father was big-time ADHD and was self-medicating with his extreme coffee habit.

Unconvinced Dad about this diagnosis decided to off coffee "cold turkey" which I did. The first day I got a little fidgety in the late morning. The second day was much of the same. By the third day the fidgets were gone but I experienced a couple of things deeply. One was the sensation that I could feel the nerve endings in my entire body. It was just short of a tingling feeling. It was as if the cells had come back alive from some "dullness or numbness state". The second thing was the experience that the whole world had slowed down. It was like a slow-motion scene in a movie. Initially, I kept asking "why is everyone speaking so slowly"? The good news is that I was off of coffee for 15-plus years. The less-than-good news is I got back on it a few years back when I became a consultant/coach. The role requires me to listen, listen, and listen more. How to stay focused became a challenge... enter or re-enter "coffee", Quitting is not an option.