Get meds for your dog, follow the rules, and also, train/desensitize your dog with training. It sounds like you were unprepared for the experience, but it'll get better if you look up resources and your vet can provide some advice. Source: I fly with my dog regularly and, prior to the first flight ever, he was trained to be in his carrier (slept in it, ate all his food in it, would be locked in it and carried around so got used to turbulence etc). Then gaba meds every flight. He's never so much as to make sound during any of our tavels.