I think it's ridiculous how much you've been messed around, Lucasmum. It makes me realise how "lucky" I am that I will always qualify for an early scan. As I had an ectopic last April, my left tube removed and I am now at a higher risk of another in the future I can self refer to the EPU for a scan at six weeks. I think I'm also really lucky in the way that the midwife I have had at the EPU all through my MMC and this pregnancy is super nice. She is happy to have me in for reassurance scans every ten day to two weeks if I need it hence why I've had three scans already. My next scan is the "real" on at almost 13 weeks which will be the first time I'm not in the EPU but I've been told if I'm worried at all between now and then, even if it's as simple as my symptoms have lessened and left me scared, I have just to call and they'll give me another appointment.
I understand that EPUs can be really busy and they don't want people exploiting their service but it seems nuts that you haven't been able to get a referral/appointment after having losses!