Odd question I know, but I'm really needing some ideas!
I will be 27 in 3 months. But I am constantly thought by people to be 18-21. It doesn't seem like a massive age gap, but there is a surprisingly large difference in the way people treat you and think of you when they think you're barely into your 20's vs when you're nearly through with your 20's.

The constant response I get seems to be 'you'll appreciate it when you're older'. Maybe when I'm 40 it won't worry me. And I'm kind of looking forward to being 30 and messing with people's heads. But at the moment I'm not loving it.
The only benefit of looking younger is looking younger. Recently I missed out on a great job opportunity because I was presumed to be too young, and therefore not experienced enough, to do the job. Then they promoted someone younger than me to the position! I really needed that money too. That has been a bit of a last straw.
I need ideas to help me look a few years older. Once I start missing out on job opportunities it's gone too far! I have no idea what to do here. It's a bit of a hard question to answer, most people want to try and look younger, not older. But if any of you have any ideas help a girl out here!