Hi Kat I'm sorry to hear that.
I really hope it doesn't come to this for me, but if I can't figure out what's going on, it just might. Then I will have to deal with all my many low estrogen symptoms again, so I really don't want it to get to that.
Anyway, before ditching HRT... Have you explored other progesterones options besides utrogestan? And have you tried the utrogestan vaginally as that usually sees many women avoid systemic side effects?
If you are having a period every 2 weeks, you would probably benefit from considering the Mirena coil - which would completely stop all bleeding within 6 months. And many women find they don't get any systemic side effects because it is local to the uterus and only a tiny dose gets into the blood stream.
The anxiety, alas that is probably an estrogen symptom - although it could be progesterone too. Starting on a low dose and remaining on each dose for at least 12 weeks before increasing if needed, is the best option there.
With the iron subject, there are two different things - there's haemoglobin, which is looking at the amount of iron in the blood right now and then there is ferritin - which is looking at the amount of iron stored. My understanding is that often only haemoglobin is run, although ferritin is the more useful test. So be sure to request that. I checked my own ferritin with medichecks.com home blood test.
They say that anything 10 and over is 'normal' for ferritin, but most people know that is extremely low and ideally you want to aim for 60-100. Mine was 44, so I am currently on Spatone gentle iron supplements. My iron has been low for years though, I am only now on iron in case it is causing my heart palps and night time symptoms.
It should only be about 1-2 days before everything is out of your system. But obviously your body may take a while to adjust to coming off it. Just like stopping the pill, for eg.