Is it normal that i always worry about how much i smile at others?

If I were to call you, right now, on skype or the like, seconds before I see your face appear on my screen, I'd have not a single worry about how I smile or express myself to you. As soon as those seconds pass and your face appears on the screen, I'll instantly become aware of all the muscles in my face and how they're not quite in the right place to make just quite the right smile.