Am I always angry?

Hello, I'm here asking this because I don't know how to communicate apparently.

Every time I speak people think I'm angry/annoyed but when I ask why no one can tell me why so I'm here trying to figure it out.

I don't have an annoying voice or am particularly irritable, I'm a normal calm person, but even when I try to explain calmly to a person who is nervous they think I'm angry, not only then but in any situation.

Any ideas of what I'm doing wrong?

Ps. I wrote this here because I count people as relationships, if this is the wrong thread group pls tell me.