Nipple pain

Jacy • 808 State | HCC | JD est.021410
I have been having discomfort with my nipples. They seem hard more than usual and a little sore to the touch. I googled nipple pain. It could be for numerous reasons. Like pregnancy, ovulation, pms, etc. countless reasons. Just want to know if others feel this or have had nipple discomfort. Any advice? 
​Please and thank you. 
​Mahalo.