Advice please

My 20 month son got into this at my aunts today. He put one in his mouth and I noticed immediately. Rinsed his mouth out and he’s acting fine. When I looked at the package it had a tear in it but tiny one. I tried calling a few doctors and the number on the box to ask advice but nobody is answering me. Any advice ? I don’t think he swallowed anything I’m just a very paranoid person so wanted to ask advice until someone calls me back