Thanks for choosing HCM,
when was the date of your last period?
ON what day of cycle did you have intercourse?
taking the first day of your period to be day 1
when the day of intercourse is around 13 th day,ther are chances for you to get pregnant....if your cycles are regular and repeats every 28 days
if you take good precautions you may not have a doubt but better perform a urine pregnancy
test at home
did you complete the course of primolut n?
wait for few days for withdrawl bleeding(your period)
because delay in periods this time may also be due to hormonal
imbalance caused by the pills you have taken
so wait for few more days for your periods ,even then if you did not get it,then go for pregnancy test at home(even this needs you to wait because you may get false negative test if you do it too early)
other wise go talk to your doctor and get a scan done
hope i answered your queries
feel free to contact me for further queries