ever since i was a kid i was very moody and would overeact on mild frustrating events. when someone does/ says something that seems rude or unfair to me i get really annoyed and immediately start thinking of ways i can "revenge", things i'd say that would purposefully hurt them.

i'm a psych major and the main field of work for my BS is clinical psychology. I think i'd like to be able to work as a mental health professional, but i don't know if i'll ever feel emotionally stable enough to do that  (i have improved a lot though, i just don't know how much more i can grow). I was at my friend's home last month and it was his mom's bday party. I was getting ready in the guest's room, that is probably two steps away from the kitchen (literally) and i overheard my friend's mom (let's call her M.) in there basically saying that she thought i'd never make it as a psychologist because i would have to deal with issues i can't handle. And she was talking really loudly. Not addressing me at all. She also said that she, for example, could work as a clinical psychologist because her job also involved listening to people. I got REALLY mad. I never had an episode and i don't think i'm a severe case, i also never expressed i wanted to work at the clinic to her??

I mean, she can have her own opinion and i know it is based on the common sense myth that psychologists have to be perfect role models that lead an amazing life, but i guess it's more the fact that she never talked directly to me and put herself in this superior position when i know for a fact she is a bad mother. My friend's birthday is on sunday, it's a costume themed party that basically the same people attend to every year, but this year i am just too angry and i don't know if i can go there. I know i am overeacting at some level, specially because i think a lot about getting back at her and exposing everything she does wrong, but i know it would be imature and disrespectiful. I talked about this with two colleagues and they said that M. would never purposefully hurt me or say bad things about me, that she sometimes lacks common sense and good manners, but at the end i don't think it really matters, because of the reasons cited above. 

Anyways, should i put this behind and go to this party? I know my friends would think it's childish to take it that seriously and hold a grudge, but i'm really really really mad and i want to humilliate her really badly. Should i use this as a chance of learning how to manage my anger and deal with real life issues?