Really hoping someone can help us 
So my five year old son started complaining of stomach pain just over a week ago. He was mainly ok for the first few days, still went to the park and eat etc, but would cry at night sometimes because of the pain.
Took him to the GP. Sent away with sachets for constipation.
Then the next two days, pooing as normal but still in pain. Crying out with it. Back to GP - told he was fine and that they didn't know what was wrong.
Then when he was collected from school the next day refused to walk, vomited, in pain again so a call to 111 and a trip to clinic. Obs checked and sent home again.
Worse pain yesterday, more vomiting, trip to main hospital paediatric unit. Seen by a senior doc who said he was fine, ride it out.
Today he's still in agony and not really eating. Had one bite of toast this afternoon and then sick again.
One weird thing. He seems ok in the morning and it gets gradually worse through the day.
I'm at my wits end seeing him in so much pain - has anyone got any advice?