Hi,
Thanks for the query.
In case of regular 28 to 30 days cycles, usually ovulation will occur on around 14th to 16th days.
As the ovum can survive for 24 hours, there is some possibility of
pregnancy.
If the pre ejaculate fluid had few
spermatozoa, that may lead to fertilization of the ovum.
You wait till your expected date of periods, if you miss the periods go for pregnancy test once.
If the test comes positive, consult gynecologist and continue with regular checkups.
If the test comes negative, possibly you may get periods.
Then in the next cycle, you track the ovulation and plan intercourse around that period.
This will increase the possibility of pregnancy.
Take care.