I know I have written this post before but just wanted to add something to it..It was a few months ago that I was very conscious of my smile from the time I learned about the lesbian smirk and thought I have it too.I used to click pictures every time I smiled.. I forgot about it for some time but now I am again becoming conscious of my smile I have also been searching if it really means that having a lesbian smirk means you are a lesbian

Have you considered working with an OCD therapist?

Are you familiar with mindfulness? Ever heard of the "leaves on a stream" metaphor? If you imagine fall leaves floating down a stream in their different fall colors. There might be orange ones, red ones, yellow ones, etc. Then imagine occasionally seeing empty beer and soda cans, candy wrappers, etc. also floating downstream. I view the trash just like intrusive thoughts. Each of us has a choice about whether or not to reach into the water and pull out one of the pieces of trash. But, the healthier approach is to acknowledge the existence of the trash (I see it in the water) but, then, let it float on downstream without trying to figure anything out about it (the rumination part).

Hey, I wanted to respond to this because I totally used to deal with thoughts like this all the time! I’m not sure if this helps or not, but one thing you can remember is that everyone perceives everything differently, so one person’s idea of a “lesbian smile” could be totally different than another person’s. It absolutely doesn’t mean you’re a lesbian if you smile a certain way. And even more importantly, people don’t care how you smile. 99% of the time, people aren’t thinking about you anyway. Think about it— if you take a picture with a group, everyone who looks at the picture automatically looks at themselves first. I hope that helps a little bit!

Maybe even write an imaginal script about what a worst case scenario would look like if others thought she had a lesbian smile and concluded that she is a lesbian.

Sadly, I don't think that will result in a long-term positive outcome. Nonetheless, all the best to you!