I got into trouble once when a customer was making a complaint to me. They thought I wasn’t taking them seriously because I was smiling. (Not true!)
I’ve found a smile is powerful.
Sometimes I make myself smile even when I don’t feel like it and it somehow makes me feel better.
I often find people smiling at me in the street. I think I must inadvertently look like I’m smiling half the time. I’ll bet sometime it’s a grimace, but I like it when they return the smile anyway. It makes me joyful.
Maybe try deliberately be extra smiley sometime in the next few days… see what happens.