You had a pad on and panties then there was no sperm contact inside of your vagina . Your egg was released already with menstruation . Highly unlikely . You will be fine .
You are not pregnant. You did not come into contact with any sperm so its impossible. Sperm cannot go through clothes and a pad.
but continuous white discharge is cuming...
discharge is not a true pregnancy symptom as anything can cause it. You could be ovulating. But no you're not pregnant.