Can PCOS lead to excessive hair shedding?

Hello doctor,

I have a lot of hair shedding, and it makes me self-conscious. I thought it was just damage (even though I never heat-styled it or dyed it), so I cut it really short. The hair shedding did not stop, so I tried to change my routine and only wash and brush my hair once a week because I found that a lot of it comes out when I brush it after showering. It has been a long time, and it still has not stopped. A friend told me that I might have PCOS, but I do not have excessively oily skin and excessive hair growth in other parts of the body, or weight gain. But my period has been irregular ever since I started having it when I was 13. I am 19 now, and it has never been regular.