>3 days of really bad headaches

I never got this, my mom would complain about this when she was out of coffee when I was younger but I have never gotten caffeine withdrawals and I have had periods of time when I consumed a lot! My last two jobs offered free coffee so I drank a lot and when I stopped working I stopped drinking coffee cold turkey because I don't have a coffee maker at home nor want to go out just to get to a coffee and no headaches.

I also drink a lot of energy drinks when I'm working on personal projects, more than the recommended amount per day and I feel like those have less negative effects than coffee, coffee gives me cold sweats for some reason. The energy drinks give me insomnia but I think it has more to do with the other ingredients than the actual caffeine.

I have quit various forms of caffeinated drinks cold turkey many times and never got a headache, but it is a little harder to get the day started the first few days after stopping because I just feel a little sluggish.