Period is 3 days late, am I Pregnant? V?

Ok so I had unprotected sex on the last day of my period and he pulled out..there Was still a little of a flow at the time.2-3days later I had pinkish like discharge when I wiped once and never again did it happen. I had tender breasts a week ago till now which told me that I am to get my period soon but nothing. It is now he third day and still nothing.. But no cramping..I had a little nausea lastnight but hat was it. My breasts still hurt a bit but my nipples dont hurt. I have a regular 28 cycle and now it's day 30. I know I'm irresponsible but I rly need help!!!