TMI--but nipples always hard after ovulation

Lauren

I'm 6 dpo and it just started yesterday where my nipples are always hard and my breast are sore. I'm supposed to start next Sunday, but keep in mind I supposedly have PCOS so my periods are irregular. Usually my period symptoms include tender breast but never had sensitive or erect nipples. I googled it and I've read that it could be a sign on pregnancy. Has anyone has had this symptom during pregnancy??