Hi Sir...My Last Period Came On 17 June 2015 And

Hi sir...My last period came on 17 june 2015 and still my period had not came..means i am having 2 months of delayed menses....i had consulted gynaecologist on 15 august and prescribed me tab norethisterone 5mg bd..and completed dose on 20 august.....but still i m not having periods...m worried that whether i will get peroids and i want to conceive as early as possible..