heeeeeeelp ! is this normal or a std ?

soooo im sucking dick right ? yanno givin some good sloppy top and i feel something rubbery come in my mouth and i’m too busy suckin so i leave it alone and end up accidentally swallowing it. just a few minutes ago the shit comes back up my throat

SISSSSSS IDK WTF THIS IS AND ITS HAPPENED A FEW TIMESSSS . IS IT BECAUSE HES UNCIRCUMCISED OR HE GOT SOMETHING ?? HELPPP !