Breast pain?

I take spironolactone 25 mg for acne/blood pressure issues. Recently I started experiencing breast pain only in my left breast that comes out of nowhere and then goes away sporadically. I wanted to see if anyone else has experienced this while taking spironolactone. I don't think I'm pregnant because I'm on the pill that I've never missed one dose of and I take it at the same time every day, and we use condoms on top of that. 
Any advice or experience is welcome. Thank you.