Talk to Gynecologist on Periods Ecp Primolut N

On 18th jan i had unprotected intercourse due to which i took ecp and after 5 days i got the brown discharge and the bleeding for 5 days then i was suppose to get my periods on 8th feb as it was my date but i didnt get it i did several hpt and all of them are negative even its been 31 days now since i had the spotting i took the primolut n 3 times a day for 3 days and its the 2nd day since i have stopped taking the primolut n and still haven’t got the periods even though i had a lot of body pain i dont know why