Being younger than your clients is the worst.
I remember how incredibly hard it was, I also know it gets so much easier when you get older, so keep heart.
BTW, most of my clients call me their sitter, too. It is just the common term for it because teachers are K-12 and provider just does not roll off the tongue or describe us as well to others. It has little to do with their level of respect for you in most cases.
Employer: "No calls during work."
Employee: "It's the provider"
Employer: "Drug dealer?"
Employer: "No calls at work."
Employee: "It's the teacher."
Employer: "I did not know you had kids in school. It is summer, school is out"
Employer: "No calls at work."
Employee: "It's the sitter."
Employer: "Oh, no, is everything ok? Do you need anything?"