You poor thing! I'm going through something very similar. Except I already knew I had PCOS. I saw GYN 2 weeks ago and I have CIN 3. I have also recently been diagnosed with Endo so I'm booked in for LLETZ procedure, a laparoscopy and endo excision all at once in April. Fun fun!
My PCOS was diagnosed by blood test and transvaginal ultrasound.
As far as the CIN 2 result, be glad it has obviously been caught early and that something is being done now. Have you had a colposcopy and/or biopsy? Take someone along to hold your hand if you haven't yet, my biopsy was done by a student doctor who took 3 because each sample wasn't big enough. I was in tears by the end and so glad DF was with me.