I sometimes feel like this but you have to look at the value you bring to the conversation. I mean suppose you were with a group of people and this group was discussing a famous musician. Better yet, suppose this conversation happened at a party. All these stories are being told around the table of how people were able to see the musician live in concert. None of them were able to meet the musician afterwards. Now you have a choice because you have an Ace up your sleeve. You are the only one who has been able to meet this musician after a show and go backstage with them. Nobody else knows this because you haven't told your story yet. This is a story that people are going to want to hear and it won't matter if you stutter badly throughout the retelling. Just the very mention of this interaction you had with this musician, people are going to be engaged and wanting to listen to what you have to say no matter how long it takes. So this is you offering great value to this round-table of stories. I'm not saying you are always going to have this Ace up your sleeve. My point is your voice has value. What you say has value and if you continue speaking in conversations, people will listen. The more they do, the better and more confident you'll feel.