When you don't know something, do not be ashamed of it. Give yourself time each and every day to have some fun. There is still a child inside, no matter your age, keep it entertained and it will not hassle you as often. Chances are that you are neither the smartest nor the slowest person on the earth. You are although a unique individual.
Some people are very good at finding and using other's 'Buttons'.
Realize this and use it to your advantage. If you know who they are, you have an advantage. If you are prepared to relax and not let them 'get your goat' than you have a major advantage. If you are suffering from severe stress, in that it affects your mood, how you feel physically and mentally, get help from a trained professional. It is seldom expensive, well worth the time, effort and cost, as well as may make your life a little better each and every day to follow for the rest of your life.