Breasts are bigger help!

I have PCOS and never had normal hormones or periods … faster forward and with eating right , work out and vitamins my periods are normal . Last month I thought I was pregnant cause my boobs hurt and were heavy . Digital test said negative, stick was an error . So I was like ok I’m gonna wait till I’m a week late to test again. 4 days in period started , passed some small clots , two days heavy , 2 days light . Period was over . So obviously not pregnant. I’ve been using opk’s and all negative. (My dr told me OPks wouldn’t work cause of my PCOS ) my period isn’t due til July 13th. My boobs are bigger … like way more plump and filling my bra out more … even though the opk’s say negative… could this be a sign I’m gonna ovulate ?