Meringoo, thanks again for all your help

I was hoping I could pick your brains again?
After reading all your info on here and doing some of my own research I decided to come off Dianette (which I had been on for 12 years) as I was concerned about the DVT risk. I went to my GP armed with a list of info copied off here and she agreed to give me 3 months worth of Mercilon. However, I'm at the end of my 3rd pack and desperate to get off of it - I'm going back to the docs tommorow to get something else.
Problems I've had with Mercilon -
- Violent mood swings, depression, crying all the time
- Constant heavy bleeding
- Complete loss of libido, pain and bleeding after sex
- Migraine that put me in bed for 3 days
Now I know that Mercilon is a low oestrogen pill, and I was wondering how this compared to the Dianette I was on originally? While I had a low libido and some moodiness on Dianette, it was nothing compared to the hell I've been through the last 3 months on Mercilon! Do you think it could be the low oestrogen thats causing all these dreadful side effects? And if so, would it be sensible to try going the opposite way and use a higher oestrogen pill instead to stop them? I was thinking of asking my GP for Yasmin this time - do you think this would be a good idea?
I ask you because my doctor hasn't got a clue. I'm hoping to do what I can to change that, starting by giving them a stack of Verity leaflets when I visit tommorow!
Edited to add: What do we know about Ovysmen and Brevinor? I've read that these are oestrogen dominant, but are they any good for PCOS?