Thanks for the query.
Pregnacare contains multi nutrients and vitamins
and said to helpful in conceiving.
That will not usually affect your regular ovulation.
So, if you had unprotected inter course around the time of ovulation, then there is possibility for pregnancy
So, you better to go for blood test
If the test comes negative, you can go for ovulation induction
with your doctor's advice and plan intercourse around the time of ovulation.