I've been seen by my local EPUs in all four of my pregnancies for reassurance scans, they have been absolutely wonderful (and I'm in London, so very busy hospitals).
My first mmc was in 2013, and I just had a gut feeling something was up, self referred and sure enough there was no heartbeat found. Got pregnant nine months later, and was extremely anxious, so my gp referred me to the EPU for an early scan at 8.5 weeks, all fine (although it only reassured me for about 24 hours), and I went on to have my DD.
I got pregnant again last October, booked a private scan at 8 weeks, heartbeat present but measurements too small for my dates. Two further scans at EPU which eventually confirmed another mmc. Pregnant again six weeks after my ERPC, anxiety through the sodding roof, EPU gave me three reassurance scans at 8, 9 and 11 weeks and all looked fine, but then anomalies were seen at our dating scan and we had an eventual diagnosis of T13 and our baby died at 14 weeks.
I suppose what my history shows, is that you can have all the early scans in the world, but it probably won't change the outcome of a pregnancy that isn't going to progress, and in fact they only allayed my fears temporarily. Where possible problems were picked up, standard procedure is to re-scan a week or two later, so you then find yourself in an awful limbo hoping for the best but expecting the worst. The only benefit for me in finding out that there was something wrong earlier, was that I could have surgical intervention sooner and crack on with ttc again. I should add, that I was very unlucky, and most of the issues with my pregnancies are probably due to my age (43), so I don't want to cause any anxiety.
Good luck op, pregnancy after mc is tough (but worth it). 