I'm a grown woman and still feel insecure about my looks?

I don't think you want to be photographed or admired. You just want a feeling that comes with it. It comes when you are admired and goes when you are not. Do you want to live in this treadmill? Just mentally step out of the feelings that constitute your 'insecurity'. Allow them to be, observe them. They are harmless to you. You will find your peace there.