My 5 week old son seems to be really gassy and it wakes him up and then it's really hard to get him back to sleep. My pediatrician recommended burping him and holding him upright for at least 30 minutes after nursing. The problem is, he always falls asleep while nursing and holding him upright or on my shoulder wakes him up. His gas is better but now he's screaming because he's overtired and doesn't know how to fall back asleep. Does anyone have any suggestions? Thanks!