Suggest Treatment For Irregular Periods

Hiiiii. I am 24 years old. I am unmarried. I m suffering from missing period problem from 2011. I was concerned to3-4 drs. my all tests are ok. dr. said to me it is causing by imbalanced harmons. when I am taking medicians which are prescribed by dr. for 3 months course then after it was working 4 to 5 months. my menstral problem well. but few months later this problem is again raised. when I am taking medicine it works properly but when course is complete it is again start. please give me suggestion what will I do? is ashokarist and himalaya evecare is helpful.