1cc is a high TRT dose, and most people back down from that. If you go over, you are getting into cycle territory. Better to start lower, get labs, and work up to a level that keeps you test at the numbers your doctor wants to see and that make you feel good with no sides.
If everything is in check, the "rush" is a mix of adrenaline from actually pinning yourself and then the following days it is aggression on higher doses. The "rush" isn't necessarily a good thing because it can mean your e2 is high.