For pregnancy to occur, there should be interaction between sperm & ovum.
of a fertilized egg normally takes place 6-12 days after ovulation.
So, presence of bleeding on the next day of unprotected sexual intercourse does not indicate pregnancy.
Under such circumstances, the bleeding can be attributed to:
1. Normal menstrual periods
2. Soft tissue injury
while performing intercourse
3. Any pathology in the Genital tract
Kindly consult a Gynecologist for a proper clinical examination.
Investigation like Ultrasound
scan of the pelvic region & Hysteroscopy
will be helpful.
There is no need to worry, she will be fine.
Wishing a good health.
Thanks & Take care.