What Causes Severe Pain In Lower Stomach With Dizziness In A Teenager?

hello im here to find out what my 17 year old daughter is having so much pain below the belly button area and the bikini area and allso has a lot of dizziness from this we have been to so many doctors and nobuddy knows what this might be if their is out their let me know this has been going on for some time now and would like to get this taking care of befor she get any older and has more problems thanks.