My 11 week old LO almost never spits up during the day. Night is a different story. She is a fantastic sleeper. She only gets up once at night to nurse and is gaining weight well within normal limits. The problem is that after she nurses at night and I'm burping her, she makes this crazy gagging sound and throws up a ton of milk. Anyone have this happen? What can I do? I literally cover myself and everything around us with blankets so she doesn't mess up my bed! Help!