Whenever I Have Light Arguments, I Easily Think Things Like:

whenever I have light arguments, I easily think things like: I'm worthless, I'm dumb, stupid, and very sad things. Once I tried hitting myself. I don't know what's going on. I had this in my teenage years. And it's affecting me now. My brother used to always have arguements with my parents in his adolescent. He was autistic (asburgers). I do not know what to do about all these things. Thank you!