My son is not wanting to nurse from my left boob but then I try to nurse my other boob and he does ? Does anyone know why ?

Tamara • Mommy to my 2 beautiful baby boys, Nathan Louis💙 born August 12, 2017 and Parker Joseph May 6, 2019❤️ My whole world😍

Could he be teething ? Like he gets super fussy; doesn’t even try latching on the left boob