Hi
@Loobydoo Knowledge is so important, for you an early (in your 20s) diagnosis means that you can get treatment and plan ahead. In my and my sisters case that didn't happen, we both have T2 diabetes and PCOS.
Unfortunately for both of us it took a long time to get a PCOS diagnosis despite having so many classic symptoms (we live in different parts of UK so different GPs I have had multiple GPs as I moved a lot due to work).
We have both had different outcomes of this and we both handle our T2 very differently, we were both diagnosed with T2 for a few years before PCOS (which in hindsight was so glaringly obvious considering the amount of facial hair we had!!)
My sister still struggles with the symptoms of PCOS, she is insulin dependent, obese and eats a high carb diet. When she was in her early 30s she changed GPs he diagnosed PCOS and said if she had been diagnosed earlier she might have been able to have children - devasting enough but she was also too old by a few months for NHS funded IVF in her area. She hasn't taken control of her diabetes and as such she now has many complications (abscesses, retinopathy, neuropathy etc). Her mood swings are legendary and her facial hair is so bad she needs to shave every day.
I had many of the classic PCOS symptoms, and struggled to get pregnant and had many miscarriages (on a VERY positive note I am now a very happy proud mummy

). I had similar symptoms to my sister, however I wasn't/ am not obese and when I was diagnosed as T2 I sought out info about using diet to help control my blood glucose levels, after a few months I also noticed my PCOS symptoms improved. Then I started to research it a bit more, both are linked by insulin sensitivity. Once I had been on a low carb diet for a few months I found my mood swings, facial hair, skin problems, menorrhagia (with associated low iron levels and fainting), abdominal pain etc etc all improved. I was so astonished at how much better my symptoms were that I started to get a little evangelical to friends I knew that also had PCOS

My blood glucose levels also improved - which was of course my primary intent.
So…… you aren't alone, I am sure there are many more women who haven't been properly diagnosed
