Sick child
What do you usually do if your child suddenly vomits the whole night? Wait till morning clinic, or go hospital straight away? LO vomited whole night, greenish and watery.

If vomit multiple times for the whole night, I will bring my child to the hospital straight away. If only vomit once, then I will wait for the clinic to open in the morning. Is it the food your child ate that caused the vomit to be greenish? Could be vegetables as I’m not sure what your child had for dinner.
Read morealways have biogaia probiotic drops at home. it helps to lessen both vomiting and diarrhea instantly. giving daily is also best, the only thing is its costly but a great investment
Check if still got energy to play anot. If super lethargic, don’t wait already
Sometimes just stomach flu only, but small kids can dehydrate fast one.
A&e straight