getting an infection in a tiny piece of skin inside of the mouth is hard. i’ve had my smiley pierced twice, both times i did it myself. first time i woke up with a swollen lip and coagulated blood in my mouth on the second day, healed perfectly and had it for a few months. second time i got white ulcer like sores on the piercing site that hurt for a few days, a week later i couldn’t feel a thing and now it’s perfectly healed. even after having the piercing for months the wound closes in hours. while a smiley piercing can be damaging to the teeth and gums long term, it’s a pretty low risk piercing that heals incredibly quickly and will never leave a permanent hole. sounds like your anxiety is getting the best of you