Need Some Help... TMI....

Me and my husband had sex earlier this afternoon and when we were done I noticed a lot of milky white discharge on his penis... Like tons of it! And I didn't cum, so I know it's not from that. But my period is suppose to be do tomorrow... 
So I guess my question is, is it normal to have tons of milky white discharge a day before period.? Has anyone had this happen and then found out you were pregnant.?