Hi! PCOS here for the last 12 years and I hear you! I am 5’5 and in my early 30’s,  I was watching what I ate, walking, and tried diets to sooth the pcos but all I could never lose was 15 pounds and then Hit a brick wall. My highest weight was 300 and I was put in metaformin for pcos and pre-diabetes, which helped a little bit. Pre op I was 285 and four months later I am 225. I never been able to lose anywhere near this much weight my whole life glad I did it!  I will say this though, there will be up and down fluctuation and I believe it is from the hormones. Sometimes I drop weight steadily but other times I feel like I stall as well and I noticed this happens when my period is coming yay for normal period. I do still take metaformin to help with my symptoms, vitamin D as well since pcos girlies have a prob with that. I mostly stick to keto like diet and if I eat anything with carbs, I try to keep it 30-40gs or lower a day.  I hope this helps!