Chi chi, I was going to reply on your other thread regarding the scan but I will reply here instead.
First of all, sorry that things have gone the way they have for you but I can understand only too well. I am also severely intolerant to all types of synthetic progestin and high doses of Utrogestan but not my own progesterone.
I think you need to have a rethink but it would be a pity to give up on HRT completely. You obviously badly need the oestrogen but like many of us, hate the progesterone used in HRT. How much Utrogestan did you take before you ran into problems with it (how many days?) and were you taking it orally or vaginally? I ask this because I use very little and string it out over 5 weeks now and it has really been a game changer for me. Have you thoroughly explored every avenue of Utrogestan and have you completely satisfied yourself that you cannot take it at all?
Moving on to the Mirena coil. This might work for you and if you definitely cannot tolerate any amount of Utrogestan, it has to be worth a try before giving up on HRT completely. Chances are, you will be fine with it but only time will tell. Most of it stays in the womb but I would be misleading you if I didn't tell you that some of it gets into your system.
I don't know about taking Testim on it's own but did read something about a women who does it a while back in the DM. If you are still producing some of your own hormones it might work for a while but I'm not sure what the implications would be once you are post menopause.
The only other alternative is a complete hysterectomy (including ovaries) and then replacing the necessary hormones. This is a big step and one which I am still considering for myself.