How can I deal with a tough class?

Yes believe it or not I used to cry in high school quite a lot I admit I was not good at dealing with tough situations at all. I would embarass myself infront of the class because of the home issues I dealt with along with bullying in high school. SO GLAD that in college none of that exists everyone just minds their own business for the most part and people here are friendly. I know that expecting professors to be all the same which they aren’t is not really the best approach. Lots of my major professors were patient but some I met but haven’t actually had a class with them yet. Tommorow is my class with that professor I will try my best to not overthink things and just enter in with a clear calm mind. If anything happens like I start to feel nervous I know what to do in order to handle it. Thnaks for your suggestions.