Hello,
The vomitings and diarrhea can be due to gastroenteritis but for the ovarian pain, premenstrual
symptoms can cause such pain. It can be avoided by taking a balanced
diet rich in proteins, vitamins and minerals. Avoid excess caffeine, alcohol and smoking.
Indulge in mild exercises everyday. You may take some pain killers like acetaminophen for pain relief. But of problem persists please consult a gynaecologist.