My period was 2 weeks late last month.

My husband and I are trying to conceive. I relied on this app to know when I was ovulating this month and we had all the unprotected sex lol. 3 days after this app told me I was ovulating- i am spotting and cramping. I know it's too early to have implantation bleeding. So now I'm worried I'm actually ovulating right now and I was just off 💔 do you guys know if this app will change around according to your late cycles ????