What Should I Do After I Took Norlut-N To Delay My Period But Having A Missed Period This Cycle?

My last periods on 14th aug. Took norlut n for 5consecutive days (in sept mid) before my period dates to avoid period as i was travelling. Now no period. I took pregnancy test too but its negative all three times. I dont want more pregnancy as I already have 9 months daughter. Please help. I reached to local gynae. She asked me to take nurokind tablet and one uterine tonic containing shilajit and chandan