last few days my boobs have been hurting and last night I was in bed my nipples got super hard and painful almost agonising because it went on for so long. They got rock hard and all veiny. I never get tenders breasts this is the first time I've got painful nipples and i literally wanted to scream. Could it be the cold? Even though I'm inside? Is this just normal lol? I'm at low fertility right now too.