This is not the hardest thing you've ever done.
It is not very likely that anyone in the meeting is going to throw up on you, bite you or cry continuously until you give them some breast milk.
If they don't like what you are presenting it is not the end of the world.
You can try again.
Or try somewhere else.
You could start a new career. Maybe you could become an orthodontist. Then you wouldn't have to worry about the kids crooked teeth that they clearly inherited from your side of the family. You could get a fish tank and a lava lamp for the waiting room. Doctor in front of your name would have a nice ring to it.
No, no. No new career.
This is what you are good at. They are going to love you.
And if they don't?
Well you've got those people back at home and a drawing table waiting for you.