Breast pain

I have no clue yet if I’m pregnant or if I’m having period symptoms. I feel like I’ve been having a lot of symptoms that could potentially be pregnancy related and one is breast pain. I usually get sore boobs around the time of my period but today especially my left boob has been having sharp pains throughout the day, and I’m getting a stabbing pain right under my left boob. I’ve tried to google this and have found nothing.