Just went in to DS as he was crying. Sitting up in bed and has vomited all over his bed and sleeping bag. He didn't seem distressed and went back to sleep easily once he was cleaned up and his bed was changed. Now I'm terrified he will vomit again and choke - does that happen at his age? Looking for some reassurance I guess as I am a first time mum and DS has never done this before... Should I sleep on his floor?