I think my 7 month old swallowed a sticker 😳🤦🏻‍♀️

It was a small star sticker. It was stuck to something I thought was out of his reach, but he got it & started chewing on it. When I grabbed it, the sticker wasn’t there anymore, I swept his mouth with my finger... nothing. Is my worry just FTM nerves or should I be freaking out?