On the topic of caffeine, I managed to overdose on it a few weeks ago. On the morning of that horrible day, I took 3 heaped tablespoonfuls of instant coffee crystals, put that into a cup, poured hot water into the cup, and drank the incredibly strong coffee that resulted.
An hour after, I felt amazing, like I could take on the world. Probably the closest to a high that I will ever get.
Then, around 2 to 4 hours later, the massive crash came. Over the course of that day, I was scared, paranoid of the idea that I would alienate everyone around me, and it'd be my own damned fault.
The two sides of my brain, the two sides which I had intended to only fight each other, had gained enough power to override the rational part of my brain. These two sides, united in their hatred for the rest of the brain, started digging through my memories. They presented the worst memories to my already-underdeveloped "social" part of my mind. This "social" part reacted by screaming in agony, prompting the "rational" part of my mind to take a look at the mess. In most cases, this leads to an approximate solution to a problem.
Unfortunately, it seemed like the problem-solving machine was severely overworked, failing to converge to any solution no matter how it looked at the problem that was staring right at it. Errors cropped up left and right, about how 'this' would do 'that', all of them feeding into this paranoia of being alone, of not having anyone to count on when times get tough.
And so, I was extremely scared, irrationally so. I felt that everyone was out to 'get' me, conspiring to isolate me from everyone that I had ever known. At the same time, I knew that such a thing is many layers of impossible, but by this point, my mind was blazing, desperately trying to figure something out that wasn't along the lines of 'you will die alone, and your death will be celebrated by all 7 billion people on this planet'.
Somehow, I managed to recover from that self-inflicted hell, but, honestly, I can't really dismiss those concerns. While obviously exaggerated, it's not like the conclusions drawn on that day were all baseless. Frankly, I'm not sure what to say. I could say that I can't control the opinions of others about me, but that's a bleak outlook on life that I can't take. I don't know.