Don’t know what to do to help my daughter

Hello All, I have a wonderful daughter, age 24. A beautiful girl on the inside, as well as the outside. She had food sensitivities as a baby. She would become blotchy when eating dairy. As a young teen, she would sometimes get significant stomach-cramping. She now experiences bloating, gas, belching, and a disagreement with dairy. She eats super-healthy, works out like a maniac and takes care of herself. She was a div 1 college athlete. She struggles with keeping her weight down (was always very thin as a young girl....and all immediate family members are thin). She can’t sleep and is often exhausted. In her high school years, she had terrible sinus issues, which wrecked havoc on her life and athletics. She was always tired. Finally had sinus-surgery, which helped somewhat. Experiences diarrhea at times. Not sure about constipation. She has a major sweating problem. She has such a plethora of issues. They are wrecking havoc on her life. She has seen several physicians, incl a gastroenterologist and a nutritionist. She has been on elimination diets. We still have no answers and this is really getting her down. I am so worried for her and her future. I am seeking a physician who can help us to unravel these many issues and help her to have a happier life. Thank you