Jeni, I remember well my first talk (share).
99.8% of me was screaming "GET ME OUT OF HERE !!" and about 0.2% was confident that I could do the talk.
I believe it says something in the Bible like "if your faith is like a mustard seed you can move mountains".
I took my 0.2% mustard seed and went and moved a mountain ...... and that fear was NEVER as bad again.
Take your sponsor or trusted oldtimer with you to the meeting.
My sponsor was with me and I knew that he had felt the same discomfort as I was feeling when he did his first talk. I knew he had walked through that fear and I could too.
I went to the bathroom so I wouldn't pee my pants, looked straight up to God and asked for strength ... and went out and did the best talk I could.
Folks came to me after and shook my hand. I guess my talk didn't stink too bad ......
All the best.
Bob R