Possibly a chance of pregnancy

So i have two different period apps all the same info and two different ovulation days. Whats the chance of be being pregnant on the days marked in my fertile window. My boyfriend and i didnt use protection and he did cum inside of me. Im am also not due for my period until dec 13th. I have had a child before so i am more aware of pregnancy symptoms. But iv had wierd pressure and a pulling/crampy sensation very different from period cramps.