My child vomits quite a lot, not as much as he used to but quite frequently
He vomits when he's otherwise fine or when he's nervous about something, or when he gets up too early so first day back at school after half term = vomiting, school trip or performance = vomiting, going out for a day vomiting
It is not retching it is really bad episodes of vomiting that last a few minutes. He also gets really bad cramping at unusual times like when out playing with mates
He has periods when he will vomit every day for a couple of weeks then not at all, he has times when he will be carsick then not at all.
We went to doctors when he was 5 they said he will grow out of it, same at 8 and at 11
He's nearly 13 - he's still does it
Doesn't seem normal to me