My 5 week old LB was sleeping and it's been 2 hours since his last feed. I'm EBF. He woke up choking so I picked him up and winded him and he vomited 3 times what looked to be curdled milk. I had winded him before putting him down to sleep and he had burped several times. He had a bit of a whimper and seemed tired and floppy after. I changed his nappy and his sternum was fine and nappy also fine and filled. His temp is 36.7c, which I know is fine. Has anyone else ever experienced this? Is this normal? And will it go away?