I would see a doctor because if your not having sex you couldn't get pregnant or it might just be the food your eating. Try a healthy diet before going to the doctor
that is not normal especially with you going thru puberty in changing from girl to woman, I would like you to get looked at!
I think two periods of 6-7 days duration in a month's time is indeed unusual and you should see a doctor. He or she will probably want to do an ultrasound to check for fibroids, and you should also get checked for anemia. Keep a chart of when your periods come and do insist on seeing a doc.
no no dear..its normal...your body is in phase of adjustment...