However my boobs have been so sore and sensitive the past two weeks, on some days its super bad. I am not pregnant as I haven't had sex since January! Is random boob pain and no period common in PCOS, almost as if the wrong hormones are surging. PCOS - Very sore breasts, mild cramping for 7/8 days: Hi there, I'm new to this site, but wanted to see if anyone has had a similar experience I have PCOS, and very irregular periods is nothing new to me when I'm not on the pill. I've been off the pill since the end of January, and I've had 3 periods this year; the last one finished July 26th.