Hiccups

Dae

So I've read that babies that get hiccups in the womb could be tangled by the umbilical cord , So now I'm freaking out because my little one had them once the other night about two nights ago and today he has had them twice. Both times weren't over 5 minutes and he's still active but I'm starting to freak out I tried calling my doctor but no answer . Did any other moms to be freak out also??