Help ladies if you can? Ovulation

So my husband just went off to deployment, and we were only able to have sex the day of (O) according to Glow and now I’m nervous does that lower my chances cause we only got to do with that one time ? I had ovulation mucus that whole day, but I don’t know how it really works like does ovulation mucus happen before or after or while ovulating? Ughhh I feel so out and he’s excited he thinks getting it directly on today makes it a bingo our first month trying