Elestra was given to you for correcting female hormone estrogen
It helps to build up endometrium. The lynerol & duphaston
were to provide a cyclical hormones for getting menses. You say its 12 days past the dose. sometimes it may take a longer time for withdrawal, wait for 5 days more. If you get even a spotting visit your consultant for next course. If you do not get, still you have to consult for further manegment. The treatment needs patience.
of uterus/ovaries or D&c with HP testing of endometrium may be needed.
If you dont have bleeding I would advice to consult a endocrinologist
...get your harmonal pattern tested,&take the treatment advised by the endocrinologist.