Trying to convince

I had to go about it the syringe way , and I did it once about 3 days before ovulation. Is there any chance that I could get pregnant or should I try again next month. I’ve been trying for a few months but it hasn’t been working.. but I think I wasn’t doing it around the right time. But I feel like 3 days before ovulation was a pretty okay chance, do I have a chance at getting pregnant you think this time or no?