Any tips on how to keep a 5 month old calm on a long car ride? When our daughter gets stressed/upset she can't breathe well. Laying at an angle in her car seat doesn't help in the breathing department for her. She gasps for air and produces a lot of mucus that she chokes on, then spits up a lot, and chokes on more. This causes a lot of stopping to clean her off, change her, and calm her down. We're going on our first long road trip with her next week and I'm scared it's gong to take twice as long because of constantly having to stop.