Can PCOD Affect Changes In Breast Size?

In my teenage years i had bigger breasts- a Full b cup - but as i got older my breast size seemed to fluctuate. some said it's stress or because of weight loss, but i know my breast doesnt really get affected by my diet knowing that i am a fit person in general. recently it has gotten smaller to an A size and i havent lost weight. (should i add i have a problem with my menstrual cycle)...help?