Hi, I used to drink 3-4 cups of home made coffee every day + take around 200-300mg of caffeine most days through a preworkout I took for gym. I've been feeling hella on edge, paranoid and very shaky for sometime already but never really tried to fix it until the end of December where I cut coffee off entirely and haven't had a cup since. I had 1 redbull about 30 days in which ruined my sleep and I had the worst sleep since quitting coffee by far(I normally fall asleep within 5min and sleep through the entire night, unless I wake up to pee after which I normally immediately fall back asleep. 

2 weeks back a game released that I've been waiting for for 4 years so naturally I took time off work and spent 60/72h playing it. Dropped my diet entirely and ate burgers and pizzas and drank 4 red bulls per day for 4 days at that point while gaming. I resumed the diet and workouts and got wasted a few days back and had another 2 red bulls. Shakiness, paranoia, that heavy feeling like I'm about to pass out in my chest(if that even makes sense lol), breathing trouble are all back. 


Now what I wanna note here is that I've been(apart from these 2 failures) been following a very healthy 4k/day diet where I workout 5~x per week and am making very good progress. My sleep has been flawless and my anxiety was basically reduced to minimal where I haven't had a single occasion dealing with any sort of chest tension, breathing issues etc. What's weird in this is that even when I don't drink coffee or red bulls, I still drink 300mg of caffeine 2 days in a row, none on the 3rd day as it's a rest from gym day and then 2 days in a row again and repeat but the caffeine in preworkout doesn't seem to have any of the negative side effects I seem to get from red bull for example. 


Does anyone have any info on this? How come a red bull, and I assume coffee would too cause such severe side effects and the preworkout caffeine doesn't? Just got me really curious lol