I feel a bit pathetic asking this after seeing threads about childhood cancer. But DS started vomiting at 4am and is still bringing up water almost 11 hours later. He's never been this sick before 
He's refusing Diarolyte rehydration stuff, even the tiniest sip of water comes back. Do we just have to sit it out?
He wants to eat but dry toast doesn't stay down either and he's getting very distressed now when he actually vomits.
TIA