I'm a FTM, and my son slept all last night, which is normal for him, but most of the day he just wanted held after he ate his bottle, I rubbed his back, and he burped and he spit up. Before he spit up he'd only sleep 10-20 minutes. After he spit up, he fell asleep, and hasn't woke up yet. He ate two bottles and that was it. Any advice? TIA