Feeling guilty?

So we've been ttc for only a shot time. (well trying with the possibility of success) Had tr in June. We have my husbands twin brother and sister that we raise as our own and their birthday is in May. So this cycle I didn't really try to time and bd as much because I didn't want to end up with 3 birthdays in May. Like we did bd the day before my positive opk but then not again for two days after. I wasnt really communicating the window as much. But I feel guilty since maybe I "threw" away this cycle and it could have been our chance. Anyone else go through this?