The egg survives for 12-24 hours after it's released from the ovaries. It's still possible.
What are you using to track ovulation? If it's just an app, they can be off by a few days. But if you were using ovulation prediction kits or temping and you feel confident of your ovulation day, then the day after ovulation is a non fertile day. I recommend buying ovulation prediction kits and having sex every day in your fertile window up until ovulation. Or every other day. Good luck.
Im fearing we arent having sex enough