tender left breast and hard nipple

Sear

something so weird happend early this morning! like 2 am which is the day im ment to ovulate. we have been having sex and have pin pointed my peak last night. had sex last night and then this early morning woke up to tender breasts and one yes yes one hard left nipple. could this be a sign we have made it happen? since waking its not hard but my breasts are a bit tender. i have never had it happen.