Its true that Yamini being contraceptive
will prolong your conception, but it will prolong conception only till it is being taken. As you have finished (stopped) taking it, it won't prolong conception further. Its not cprrect to take Duphastan & Clomiphene
blindly with monitoring ovulation, at least in first cycle. Its better to consult infertility specialist
who can do ovulation induction
properly to increase chances of conception.
Wish you good health & quick pregnancy.