Finger sucker!!!

Alisha • One son...2nd 🌈👶🏽 on the way and it’s a girl!!! 🎀

My 20 week old has recently decided that he wants to suck his 2 fingers on his right hand and will have a fit if he can't have them...anyone know of anything I can do to make sure this doesn't become a habit, it's bad already 😔 I've already tried mittens, he just takes them off and he doesn't want the pacifier anymore