Tender nipples?!

Anyone else had tender nipples and then found out they were pregnant? I’m due for my period in about 4 days and for the last couple of days I have noticed that my nipples are always red, hard and tender to touch. Wondering if anyone else has experienced this and if it could mean I’m ovulating or possibly pregnant? According to this app I ovulated 11 days ago. Never really get sore boobs/nipples before my period so doubt it’s that. Thanks! 😊