I'm also overweight (5'6 and 189lbs), and
have PCOS (diagnosed 1 yr ago). My periods
have always been extremely irregular
, but never problematic, i.e. pms symptoms, cramps, etc. Actually I've never had cramps (uterine cramps, "up front") and only ever had slight lower back pain, with rare occasions of extreme lower back pain. Also only on rare occasions has the flow been extremely heavy to the point of interfering with daily activity, most of the time it's been "normal".