Hi...my Daughter Is 9...3 Days Back She Suddenly Developed Stomach

Hi...my daughter is 9...3 days back she suddenly developed stomach pain in the middle if the night with headache and fever. The next vomiting she also had continuous vomiting unable to retain anything. We went to the doc he prescribed O2H and Ibugesic for fever..but I hv observed that after she takes O2H....her vomiting starts again... Is it possible that O2H is triggering the vomiting.