Hi my daughter is 13 not started her periods yet and does gymnastic training every night at a high level she had a day of belly aches and sickness all day the sickness stopped that night but the belly aches have continued and are worse in the mornings she had blood and urine test the blood test came back ok bit she has blood in her urine we had an ultrasound this morning but have to wait for the results tomorrow she did say she was measuring what could be a cyst on her ovaries is this dangerous for a teenager ? And would this cause bad belly ache ?