I've been told felt is a pov violation. Here's a sample sentence - Avery felt his stomach flip. Someone said that the mc in third person wouldn't acknowledge feeling his stomach flip, it would be more along the lines of - Avery's stomach did a flip. or Avery's stomach flipped over. My only concern is that your stomach doesn't technically flip over it only feels like it does so wouldn't you mess with the logic of making it exact? Any ideas?