Talk to Gynecologist on Gynaecological Problem

AOA, I was having irregular menses problem from last 2 months, before august 26 i had normal regular cycle then after that i got menses on 15 OCt then at 8,9,10,11 nov i had slight brown spotting, then again on 25,26,27 and 28 I had some brown spotting. i did a pregnancy test at home which came out negative. I went to the doctor and did blood pregnancy test(30 Nov) and pelvic ultrasound (reports attached ) all clear. the doctor said that 25 to 28nov spotting was your actual menses while I didn't have periods yet its 1st Dec. she prescribed me Duphaston(to take for 20 days), folic acid and vitamin D tab. she said to come on the 3rd day menses . my question is AM i PCOS ? ultrasound is normal then why I am not having menses? I am TTC also, 2 years of marriage with everything fine dose this denotes of hormonal imbalance? and what if hormones are normal too then what's next?

this was my first ever visit to the gynecologist and all these tests are also first time