Feeling sad. Help!

So today was apparently my most fertile day and my hubby reassured me we would do the deed today but instead he spent the night with his friends and now my most fertile day is over and I'm feeling quite down.. Has anyone else missed there most fertile day but still conceived the month after? (If that makes sense) Or am I following Glow too closely and should I just relax and let nature do it's work? .. :(