Jeni, I can totally relate to you. I am in sales, and sales involves talking to people on the fly, and having a conversation with people you do not know. But put me in an AA group or meeting, or in front of people in AA, and I become totally speechless and petrified myself.
I am working through this by doing exactly what I am afraid to do. Walking through the fire. I am chairing meetings, which involves giving a short lead in front of the group of usually 15 people or so. I think the way to overcome this is by facing the exact thing we are afraid of. As simple as this is, I know how hard it is, too.
I believe confidence in this regard will only come through experience. All will work out. If you're anything like me, we need to stop putting so much pressure on ourselves and just do it. We're not any big deal, anyhow.
I wish you well,
Billy