lizziejt, sorry to hear about your progesterone problems, I've been there myself.
It's a difficult one and once you reach the end of the road and have tried everything that is available, your choices are very limited.
I was considering a hysterectomy but I decided to have one final attempt to find something that worked and I came across compounded progesterone. I found a clinic that specialises in bespoke progesterone, had a consultation and decided to give it a go. My problems were migraine related but like you, I got to the stage where I had tried all conventional forms of progesterone and none of them worked, they all triggered migraines in my case.
Long story short, I now take 50mg progesterone every day alongside conventional oestrogen and testosterone and more than two years later, it's continuing to work very well and I'm glad I didn't opt for a hysterectomy. I found that 100mg Utrogestan in one hit was too high a dose.
I'm on a continuous combined regime and one huge bonus for me is not having to endure the bleeds.
It's not an easy option, it's expensive and it's a last resort really but I had no choice. You might want to consider it yourself but you may have to reduce to a slightly lower dose of oestrogen or take a slightly higher dose of progesterone if you want to continue with the 75mcg patch.
I have a thread on compounded hormones in the Alternative Therapies section on here which you might want to read. I will bump it up for you.
One other option would be a lower dose progesterone coil like the Jaydess. I'm surprised the C&W didn't offer this to you.
Why did the C&W discharge you?
I hope that helps.