Hi Kerry,
I am so sorry to hear this – it really sounds like you are going through a tough time.
I am wondering if your clinic team have talked about endometrial testing for you? Its classed as an ‘add on’ but some clinics offer something called ERA – Endometrial receptivity assay testing on the womb. lining to see if there is any issue with the lining itself. Also might be worth talking to your clinic about the Progesterone regime you have been taking to see if any changes could be made. Have you had your thyroid levels and Vitamin D levels checked at all as part of the RMC bloods? If not – it might be worth checking those as thyroid problems and low Vitamin D can be linked to miscarriage.
Hope that helps?
Fran x