Do I still have a chance?

So on the 31st I tracked my ovulation through bbt and it was negative. The next day I tested and it detected ovulation. I have a patch that I use that tracks my temperature so I know when I ovulate. It told me I will only be fertile for a couple more hours. I had sex 3 hours after that. Do I have a chance? My bf came in me and we are both trying for pregnancy. I haven’t had any symptoms at all. Do I have a chance this cycle or is sex the DAY OF ovulation too late?