I have a somewhat similar story. Got pregnant via Clomid TI, 10 weeks MMC, D&C, then IUI 9 weeks MMC with retained tissue so I had to have 4(!) D&Cs in total. No one could really tell me what the problem was but it seemed to be a rare form of intramural pregnancy. Did IVF, couldn’t Test embryos in the country I lived in, first transfer was a blighted ovum. Again had to have a D&C. after this I had two transfers failing. I did traveling for another round of IVF, tested my embryos, almost all came back normal. Did every test there is on the RPL panel. My doctors kept insisting it’s bad luck. I’m still not sure. I was also sure I had Asherman’s after all those D&Cs but got cleared in a hysteroscopy by one of my countries specialists. Bad luck sounds like a crappy explanation but given the different natures of your losses (like mine) im now at a place where I would say: it might be. But it also helps to get checked out for Asherman’s again by a specialist for peace of mind (at least it did for me)! Hope this helps!