I'm 30 now and have always had an issue being interupted or not being paid attention to when speaking. This is especially bad at work as I'm in a management position.

The thing is, I'm not sure what I'm doing wrong. I'm good at public speaking, I'm not timid when I talk and have been told repeatedly that I have a loud and powerful voice.

It even happens at home, I'm speaking to my dad and my sister interrupts out of nowhere to ask a question to my dad. It's not even a fault of my sister or my parents as they are very kind people. But obviously I was doing something that implied she could freely inerupt.

Any advice? It gets extremely frustrating when I have to repeat instructions/things I'm saying in a group because I wasn't holding their attention or was interrupted.