I get angry

One of my issues with my mental health is that I get my back up because people don’t believe what I tell them, I have to prove myself all the time which makes me feel that my opinion is invalid and not good enough, makes me feel worthless…in turn that then makes me angry, because why must people second guess me?! Have I proved to them that I don’t know what I’m talking about? Have I proved myself incompetent?! I get furious, I see red. I get flustered and then I want to cry which makes me seem weak which makes me even more angry. I am so quick to anger which isn’t usually like me…