HI I have 3 children who have displayed the same symptoms throughout the past week- it starts with an ache in the tummy rather bad, then develop a fever, nausea (occasional but minimal vomiting) extreme fatigue and headache. The symptoms last for a day or so,then go away completely, then come back in a day or so! My children are almost never sick, I treat with homeopathics primarily and they are very healthy boys-5,13,16. Any ideas? Thanks