I did that (consuming caffeine every day isn’t great with IBS). I found that the need for stimulants doesn’t go away, even after I got rid of the actual withdrawal symptomes (headaches etc.). Turns out, I’ve been drinking so much coffee because I have various issues that caffeine helps with, not just because I got addicted.
Many years ago I quit caffeine for about 2 months. Withdrawals went away quickly, but I was missing my morning routine. When I finally went back, caffeine kicked my ass because I had zero tolerance to it, and I had to be really strict with my cutoff time for any caffeine for a long time. I still have to be careful ever since then. Used to be able to have coffee or soda at night and have zero effect. Luckily I’ve quit soda.