I think it was the physical pain of the shot, combined with the stress of the unknown. Yeah it was mostly psychological, once I realized I could be in control of my emotions again, like how I do in trading, I was able to overcome it. After the first shot I reverted to my mean, to my my old ways like how I was back on steemit. It was short lived and I came back to my senses.
Yeah I used to take creatine too, and testosterone shots, and even a took a few drops of GHB for weightlifting too many years ago and got pumped up. Back then I was really crazy and out of control, mood swings and all that.