My 8 year old girl has brown spotting, according to her Pediatrician she is at 2nd stage. In her breast development.She is 55 imches tall and weighs about 90 lbs. When can I expect her to start her period. Or is this her first period?. I started at the age of 11. We are from South India. Kids are born in USA. I am worried for my girl, she is too young for thiss.