Is there a chance?

Hello! I have been trying for the past year to get pregnant. For this cycle, I took letrozole days 5-9. On day 15 I got an ultrasound done and had one follicle 23.5 mm. I got an hcg trigger shot at that time. I was told to have sex the next few days, however, with my husband working nights and me working days, it was really hard to do so. We did have sex that day and the morning of the next day. I really feel like we wasted this shot… is there any possibility I could have gotten pregnant? I saw online that it takes a day or two for the shot to take effect. So I’m not sure if I completely missed my window or if those two days were ok. What was your experience with the shot? Thanks!