Help identifying symptoms

So my periods have been irregular since I first got mine. The most periods I’ve ever gotten in a year is two. Right now it’s by six and a half months, and my doctor had me go in for blood work and I have to get an ultrasound soon. My periods are usually ten days, heavy, but I’m on the lower end of the healthy weight for my age. I don’t have abnormal body hair, and my metabolism is really fast. Does this sound like PCOS, or is it something else?