Help kinda confused

Ok I goy my AF on the sep 8th (my period use to last 5 days) but I notice my last 2 previous cycles lasted 3 days and the other 2 I was jus sporting.. and on this cycle 1day very heavy period flow then 2 day it was a normal amount and 3 was lighter but the other 2 day I wa just sporting like I can only see discharge when I cleaned myself. Soo I got my period in the 8-10 but I had unprotected sex on the 13 because glow said I was going to ovulate on the 20. BUt I notice I started ovulating on the 17-21... so what are my chances of become pregnant??