Lisa789, I think the standard of treatment you are receiving is pretty poor to say the least. This comes up on here time and time again whereby doctors do not understand the menopause or HRT and it is women like you who always pay the price for their lack of knowledge.
There is no reason why the NHS cannot licence Utrogestan to be taken vaginally - I have yet to hear a reasonable and logical explanation for it. If you take it orally, you will probably have more side effects and it is less effective when taken in this way because much of it gets lost in your digestive system and you will need to take about twice as much of it to get the same effect. It makes no sense whatsoever. If you are intolerant to synthetic progesterone, the Mirena coil is unlikely to be suitable for you either.
I am severely intolerant to all types of synthetic progesterone and to high doses of Utrogestan but I have never suffered from PMS. Therefore, I take the barest minimum which is 100mg Utrogestan vaginally every month for 7 days and that is enough for me - like you, my only other alternative is a full hysterectomy. What you really need to do is to seek the advice of a hormone specialist who will probably prescribe the same for you along with 2 or 3 pumps of Oestrogel every day.
I would suggest you make an appointment with either Professor Studd, Dr. Nick Panay or Dr. Annie Evans.