Ds does the exact same thing. at times we'll drive and he doesn't make a sound, but there are times when he'll do the saddest little cry i've ever heard. sounds like he's in pain, he'll cry to where he sounds like he's out of breathe then start coughing, then continue crying once more. as soon as i get him out he stops also.
a little concerning when we're going for a 7 hr drive next wkend. not looking forward to it if he's like that.
i was thinking DS doesn't like to be restrained in his seat, cause he'll sit in it, no straps on, inside the house no drama, have no idea if babies can get car sickness, i didn't even think of that possibility.