thanks for your query.
Even minor amount or seminal fluid is enough for pregnancy
, as it may contain active sperms.
Also, around the time of ovulation, the chances of preganncy are definitely high.
generally occurs within two weeks of conception.
The symptoms of early pregnancy are many, however they are not reliable for diagnosing pregnancy.
If you have always had regular periods, then the best way for you is to perform a home urine pregnancy test, as soon as you miss your period.
Also, be particular about using a permanent reliable contraceptive