How To Treat Hormonal Imbalance Leading To Irregular Periods?

Hi doctor,I have irregular period problem since september 2014 ... My gynae gave me injection after 5 days i got my periods n next 2 months no periods ... Doctor again gave me injection .. Then after 5 days i got periods back .. N after 15 days of cycle 15-25 days i had duapstone 10 mg tablet twice a day .... My LMP WAS ON 23 dec i started duapstone tablet on 6 jan till 15 jan 2015 .. When can i expect my cycle .... My gynae told me i have harmone imbalance ..... With dupastone can it be regular or shall i need to continue this medicine ... If yes then how long ??? Thanks in advance