Feel really embared at how pathetically young I look.?

I am so ugly and freak like. Today a woman came in to inspect our services (I work with kids) and after a while she went out of the room, came back and asked how old I was. When I said 25 she exploded with amazement and said she thought I was under 17 and so she had concerns I was too young. I am mortified. How can I be taken seriously when I look so young?