15 year old daughter has nausea , fatigue , headaches dizziness , abdominal pain swollen lymph nodes in neck very heavy periods ongoing for the past 5 months...the last three severe at times. Ended up in hospital twice...diagnosed with gastritis first time then possible ovarian cyst 6 weeks later. I think she needs to see and internal specialist,,,she feels ill 90% of the time...and tire of feeling sick...any suggestions?