I've had three miscarriages in last seven months and have recently gone through rcm testing. All of my mcs ended between 5-7 weeks.
First off, if your GP is supportive then ask him or her to do blood tests. Mine ticked the box for testing everything she could and it gave me a baseline set of results to take to the consultant. From the first appointment he was therefore able to rule out a lot of the more obvious things.
I was advised to not get pregnant whilst undergoing tests, as it obviously complicates things. The whole testing process only kept me out for two cycles however. Hormone levels are checked, thrombophilia (blood clotting) and thyroid too, and a transvaginal ultrasound done to check out structure of uterus. I also had an MRI because the TVUS was unclear.
Here's what I found: I have mild PCOS (no problems conceiving - I conceive every cycle I try); I have a mild clotting problem; I have focal adenomyosis. Here's the rubbish part, though...it is unclear whether there is a link between my specific problems and rcm, because no testing has been done. There might be. But then again, maybe not. And if there is, with the exception of the clotting problem, there's nothing that can be done to try to prevent mc. Progesterone isn't prescribed in UK as it's proven ineffective - that was one I read about commonly.
Also, the NHS (and indeed BUPA) no longer offer karyotyping (genetic testing) as the possibility of discovering anything is so low. Genetic testing is only carried out on any products of mc that can be retained.
I'm currently 6 weeks pregnant again, and I'm on heparin injections for the clotting problem. However, I started spotting yesterday so I've no idea if things will progress this time either.
It's worthwhile doing the rcm testing of course, but be prepared for them not finding anything, or not being able to suggest anything if they do. It seems to be an area of medicine that still has a lot of unanswered questions.
There are further private tests that can be done (NK cells) and IVF is of course an option. But I cling on to the success stories I've read about of women who have got their happy endings naturally - but I'm prepared for what it might take to get there.
Hooe this helped.