What Are The Symptoms Of Pregnancy?

On July 6th I had a REALLY quick sexual intercorse without a condom (7 seconds) and he cleaned off the pre cum and peed that day and the day before without having ejaculated the day before and so. Then around the next week, we also did the same thing but even quicker. (He also has peed before during the day). Now on July 18th I started to get tender breasts, hard, sore, like the usual symptoms of my period. In the month of June, I got my period on the 21st or the 20th. In May, I got my period on the 20th exactly and I was worried back then too if I was going to miss my period or not. It is now the 21st evening and still no period, but I continue to have tender breasts. I get tiny leaks, but if thats an infection, I am not worrying about that right now. I just want to know, what are the chances of me getting pregnant? If I m having my regular symptoms of my period at the regular time. (I get my period around the 20 s, sometimes exact, sometimes not) I DONT want to be pregnant!