Wow, the 4th day without caffeine and it feels GREAT!
Actually I became a chronic caffeine user only 3 years ago because I was also studying at that time and was also overweighted, lived unhealthy lifestyle, loved to get high from drinking coffee lol...
Till 2011 when I completed my first bachelor's degree I rarely had drunk any black tea. I also was an active gym goer that time and could bench 145 kg and deadlift 245 kg x 10 x 3 during those study years... and ironically but it all without any caffeine!
Also, like I have written in my previous posts I'm bipolar so DEFINITELY should avoid caffeine.