HI Well come to HCM I have gone through the history given here, good appetite is matter of concern and not the calorie along with the healthy digestive function, good health (Good mental health) also matters the great and not the calories least concern how much calorie you are taking if above mentioned health are good, now for the diarrhea and vomiting it may be due to dyspepsia this is the pretty common condition seen, and it is the self limiting condition, may not need any treatment. Underlying cause of any symptom is matter of concern and that need to be managed and not the symptoms it self, in your case just wait for couple days and it will be fine on its own, hope this information helps.