Suggest Treatment For Irregular Periods

hello, I am 27 years old girl. I am not getting my periods regularly. My sonography and blood reports are normal. In the past I had teken pills to control my periods. I have epilepsy problem but its been two and a half years that my EEG report is coming normal. and i havent got any attack for last five years. I am taking Lemetec 100 DT and I dont have any other health problem. kindly suggest me how to get periods regularly. Thank you.