hoping it’s not what I think it is..

I just had a really bad cramp and my period starts in 4 days i was ovulating on the 6th of this month but I never did an ovulation test until yesterday I don’t know why I didn’t do one sooner I’m just new to this I just hope with tracking my period this app will be accurate but who knows 🤦🏻‍♀️ I’ve been with my boyfriend for about 4 years now and we talked about it and we both are in on it but I just want to know if cramping is normal is it a definite that I’m getting my period ?? I’m just hoping for the best It would mean the world to me to become a mother !! Especially with the love of my life