hi , I have a son 10 years old, last two weeks he has pain in his stomach, also he has gas , he is burping and has constipation. In the morning when he is in the school his pain is less and he said when he is running and playing he doesnt have pain, but in the night whe is about to sleep his pain is more, he said it feels like niddles,some times hi has headache too. I hope you can help me with this i start to be concern