i'm a violinist, its what i do. I play lots of things and i've been playing forever.
I've played in Big groups. and i've played in groups where i'm basically the only melody part.
I've played in front of a school, and I've played for a wedding, in front of a bunch of family.
My advice: You will do what you have learned. If you cant play it perfectly in practice, you will NEVER play it perfectly in front of people.