Advice

My husband and I had sex on Thursday night and we weren’t planing on trying cause last month we tried and I didn’t get pregnant. So we were like it’s not meant to be yet but we have it chance to see what would happen, he finished in me and it was a day before my ovulation according to glow It was 33% of getting pregnant. My question is that can you get pregnant for sure on that high percentage? With my son we did the same and I got pregnant quickly. Thank you