Can anybody help me I had sex today and yesterday and my pd was due 3 days ago. I took a test…

Can anybody help me I had sex today and yesterday and my pd was due 3 days ago. I took a test yesterday and it came out negative, I have to wait a week but before that. I had sex in March like it says on the calendar. Can someone tell me the chances of getting pregnant when you also had sex on your missed pd??