Can it happen?

So me and my partner haven’t used protection since January, but never really tracked etc until a couple of months ago. Did three months and nothing happened, last month we didn’t even have sex more than twice in the whole month so wasn’t surprised when Aunt Flo showed up! I’ve been off three days and we just had sex. BUT my ovulation week is our week off together for our 3 year anniversary... now we have a lot planned and I’m super worried we won’t do it when we should etc but I guess what I’m really asking is on the off chance that we only do it once or twice that week would today still count? I mean I know it’s a super low chance but could there still be a possibility? My periods/ovulation are never regular so I’m only going by the app! But hopefully this will be our month :)