I quit caffeine for a few weeks back in 2011 and the only thing I remember was the headaches during the first week. Since then I have been enjoying my daily 2

I quit caffeine for a few weeks back in 2011 and the only thing I remember was the headaches during the first week. Since then I have been enjoying my daily 2 cups in the morning, and 2 more around lunch time. I just love the taste of coffee in the morning combined with a nice sweet e-cigarette/vape flavour. But lately I've been thinking about quitting caffeine and nicotine for at least a few months to see how it affects me. The last few years have been rough for me personally with anxiety/burnout/insomnia issues and a late ADD/autism diagnosis in my mid-30's, followed by a year of almost daily cannabis use because falling asleep without it seemed nearly impossible. I'm off the cannabis now and on methylphenidate for the ADD and even though the medication improves my ability to focus, I'm beginning to notice that the combination of methylphenidate+caffeine+nicotine is horrible for my body and mind. Seemingly random I have sudden flashes of sweating, elevated heart rate, elevated blood pressure and falling asleep at night is still an issue. Maybe reading this HN thread is the trigger I needed to try once more to get rid off the caffeine and nicotine. I'm not looking forward to the withdrawal headaches and likely even worse insomnia for a while.