Suggest Remedy For Irregularity In Periods

hello doctor,
I am 21 year old girl. I have problem of menstruation disorder.when I feel that problem I was only 16-17 year old and I take the pills by doctor direction. Now I again suffering with this problem from last Year then I again take the pills(i.e. Yamini) by doctor direction.And doctor also give some test (i.e. thyrid,altrasound) after seing the report doctor advise to loss weight and said that I Have no thyrid problem but have some problem in altrasound. after this I take Yamini pills till 6 month. I feel that this problem never come again and also loss weight. but now from 6 month I again suffer with problem means that perid come one month after taking pills (i.e. primolut ) than period start but next month again this problem occured.I also take a Hema Cardial sirup for this.there is no benefit with this. from 2 months I take that pills to start the period. But now again I miss my my period. please doctor suggest me what should I do. reply me soon