Last period was September 2018. Been prescribed provera again for the 3rd time. Has it not worked for anyone else? (PCOS)

[Saammiiee]

I’ve been under the gynaecologist team since March this year. I haven’t had a period since September 2018. I was diagnosed with PCOS this year after scans. I was then prescribed provera for 11 days to bring on a period. That failed to work so I was given the same dose for 21 days. It still didn’t work so I’ve been told to go on them again for another 21 days at the same dose. I need to bleed to have a scan on my tubes and pelvic area. I just feel as if I’m not getting anywhere. Has it always worked for others? Also has anyone else been this long without a period? I’ve had tests for menopause and they’ve come back fine. I’m not overweight and I’m 27 years old.