My 14 yr old son got up yesterday morning complaining of stomach ache,after which he vomited and also passed stool which was watery. He also had a very high temp of 103. We have been giving him 1 advanced crocin every 4-5hrs but his fever is persistent, and keeps fluctuating. And he has gone for motions quite a few times and it has been watery. He is not eating much due to loss of appetite. We keep giving him electoral after each motion to curtail weakness. A friend of mine suggested that I give him O2 tablet as his son had gone thru similar sickness. Please advise...