Good Morning
Feelings can either be helpful or unhelpful. Helpful feelings give you direction - like a compass. Unhelpful feelings may overwhelm and paralyze. Most unhelpful feelings are fueled by mistaken or irrational beliefs. In other words, mistaken beliefs turn irritation into rage, sadness into depression, and appropriate nervousness into panic.
Thus, if you want to change the way you feel, you must change the way you think - because it is not the events that upset you as much as the way you perceive them.
If you demand that you must always be perfect, then you are guaranteed to upset yourself frequently. The more rigid these beliefs, the more frequent the upsets. In addition, the more you tie your self-worth to them, the more deeply upset you become. It's a no-win situation that fuels much anxiety and depression.
It is much more helpful to work persistently on changing your attitude from "I must be perfect" to "It would be nice if I was perfect, but since nobody is perfect I will invariably make mistakes - and that's OK. I should try to learn from them." In short, by accepting the reality of your own human imperfections, you will be less likely to get overwhelmed or beat up on yourself when you are not perfect. Look into therapy as it will help you understand your feelings if you give it a chance - at least it did for me.
Like you I am a sensitive person and always have been to the point where I have been told I am oversensitive which caused me to try to be what others expected. It did not work for me as I did what you are doing, I tried to please others and assumed I must be inadequate. My esteem took many blows until I finally accepted that what others thought of me or what I perceived others thought of me did not make a difference. I have to love myself.
I hope this is not mucking up the waters.
Gentle Hugs,
Kitt