Practice mind control and master it! Get rid of bad thoughts; they will just constantly remind you badly of yourself. Instead, use that flaw as an inspiration to train yourself and get better at anything.
Pull the trigger by turning that sting into a positive trigger; it will remind you that you're building confidence around something different.
Monitor your time. Reduce reaction times and set limits each time you practice. Remind yourself to do it in a shorter amount of time. Be honest and monitor how long it took.
Make your impact. Control your emotions, gain the skills you need and move towards your goals.