discharge is not a true pregnancy symptom as anything can cause it. You could be ovulating. But no you're not pregnant.
but continuous white discharge is cuming...
You are not pregnant. You did not come into contact with any sperm so its impossible. Sperm cannot go through clothes and a pad.
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 .