Hmm.. I don't really see the problem. I mean the point is to communicate what you want to say right. And this secondary behaviour that you've developed is just an inflection of your voice. It allows you do get stuff done, whether that be phone calls or ordering at a drive though. It works for you and that's all that matters. If you we're using a technique that avoids saying the word you're about to block on, then it would be bad. Because you would be subconsciously reinforcing to yourself to you can't say that word / phonetic sound. But that doesn't seem to be the case here. I would say that your mom needs to be more empathic and understanding. Like she's telling you she'd rather hear you stuggle to say you're on name, struggle to even say hello andhave all that tension and lack of oxygen saying words. Just because she doesn't like the sound of your voice. That's crazy. She needs to understand that you gotta do what you gotta do. If you needed to call emergency services because you're mom had an accident or fell ill, would she rather you silent block on words and have EMS hang up on you ot be like "Hello?? Hello?? Are you there??". Or would she want you to use you're technique so you they can understand what you're saying and get paramedics on the way.