My daughter is having stomach pain most of the time. She s not constipated, she go regularly. Sometimes when her stomach is hurting, she will vomit. The pain is on RUQ. At first she think she had indigestion, so she start taking for acid reflux, but it did not help. What do you think is wrong, and what kind of test she need, to find out what s going on. She s 19 yrs of age. Thank you.