sebs Have you tried speaking to your GP at all? Mine was very understanding, and she actually prescribed me the progesterone - however, this is standard RMC protocol at my hospital, and they had provided after my 3rd mc a letter stating that I should receive it, should I fall pg again.
I'm a bit surprised that your consultant is so reluctant - yes, age is certainly a factor, but my 3rd mc was also a chromosomal abnormality, as was my 4th, and they are still all happy to prescribe me the progesterone.
I have heard both the 2x200mg and 2x400mg dose being given, but I don't know the reasoning behind these!
However, I would be very cautious buying this over the internet - it is not an over the counter drug, and needs prescription for a reason. Progesterone is also known to cause bleeding, I bled/spotted in both pregnancies during which I have/am taking it, and I have heard similar stories from others. No idea if it's due to the progesterone or not!
It's a horrible limbo, and I feel for you! You want to do something...
If it's any consolation - I am not on the Coventry protocol as such, however, I am currently taking aspirin, heparin and progesterone - progesterone because of my RMC history, the aspirin and heparin due to a history of DVT. I was taking the exact same drugs in my last pregnancy, which still ended in mc, due to trisomy 18. This is why I did not go to Coventry, and I seriously doubt that my consultant would have considered giving me the steroids, as it's clear that my age is most likely the reason for my rmcs.
Do you think your consultant would consider prescribing just the heparin? In my opinion, this might be the most effective thing to do - more than anything, it has cytoprotective function and helps the placenta to establish. Unless you have reason to believe that your immune response is involved somehow, I would stay clear of the steroids.
Sorry for the ramble, and probably not too helpful! I would try your GP and suggest a modified Coventry protocol to your consultant, stressing that both heparin and progesterone are standard rmc protocol, independent of age. Good luck!