How about you do as the specialist has suggested? Start using the oestrogen as directed, whilst simultaneously reducing the cyclogest by 100mg a week. Once you're on the oestrogen only part, you'll probably find you'll have a big bleed. Wait until day 15 after starting your bleed (or oestrogen only if you don't have a bleed), then start taking the Utrogestan 200mg (at night, as it's very sedating) for the twelve days. You should have another bleed at that stage. As with any hrt regime, you will need to give it about three months to settle, and you may have some iffy days, especially as you're coming off such an incredibly high dose of progesterone. Like you say, you're already feeling pretty bad, and have done for a while. There is no magic bullet, it's taken you a few years to get to this stage, so expect it to take a little while to settle in.
Good luck with it all xx