This seems weird to me

I’m ovulating now today is day one post ovulating. I’m mom of 5. Can’t say this has happened before. My boobs are seriously killing me right now. Feel like they were punched or something. I’m starting to think I may already be pregnant and my ovulation predictor is off.. it’s the only thing I can think. My period isn’t due for another week in half. Usually they do hurt a couple days before I start but this has been a little over a week now.