I hate to talk! And you?

Often I have to repeat myself!! I’m fed up! I hate it! When I talk people are asking what I’m saying and it makes me insecure, introvert! When I was doing job interviews the interviewer often asked me to speak slower so that they can understand me well, and I’m joking saying it’s due to the stress. Yeah say that for a job where you don’t have to be stressful. My wife often say that she doesn’t understand when I’m talking. My friends jokes with me about that. The problem is that I rarely talk first, never say jokes because people will never understand… when I’m at a counter or ordering at restaurants I speak loud and clear so that they understand what I’m saying, I’m doing this as a habit and only noticed it when my wife pointed me out. Every goddam time she say why I’m talking loud. I’m tired of explaining the same thing. Like one time first day at college, I had to say my name so that a lady could find it on a list. My name begins with an S she tought I was saying it with an F. It took more than 5 minutes to find it.

How to say it’s being difficult because I have to make effort to speak slower and pronounce every work very well like an idiot.