My girlfriend and I had sex on the 17th and 18th day of her cycle, on the 17th i used a condom, on the 18th i didn't but i ejaculated outside of her, she has PCOS and is taking birth control pills for six months now, the thing is that on the 2nd, 3rd and 4th day of her cycle she took the pills 10 hrs late, other than that she took the others on time, what are the chances of pregnancy?