Before my period stopped it was very irregular? I'm 15

Hi,
Welcome to ehealthforum,
It is difficult to comment on the cause for your absent periods without examining you and going ahead with further investigations. For some girls, during puberty, there can be long gaps between periods and bleeding can be prolonged once they get the periods. This usually happens due to anovulatory cycles (menstrual cycles without periodic egg release from ovary). As you finish the pubertal stages and mature, the cycles change to being ovulatory ones (menstrual cycles with periodic egg release from ovary) which are regular and with lesser bleeding. You should consider visiting your doctor/gynecologist for further evaluation including investigations like hormonal and blood workup along with ultrasound scan to look for the underlying cause for your absent periods. Treatment as appropriate would be started to help you based on examination and test result. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle.
Take care.