My son just turned 3 and the past 2 mornings (once at 3am and this morning at 6am) I heard him cough and then ran into his room to find him standing by his bed, gagging and vomiting . The vomit is very dry, in chunks and yellowish in color. In fact, I can see that it s Mac n Cheese that he threw up the first night. After he vomits he s absolutely fine with no other symptoms (no fever , no stomach pains, he s actually hungry). I noticed this morning he must have climbed out of bed and turned on the light before vomiting so he was aware he didn t feel good. Not sure what this could be, especially since there are no other symptoms. What should I do?