I am so sorry for your loss.
It is truely a sad and hard process to go through. I opted for a d&c from my obs suggestion due to bubs size. I to had that feeling what if they are wrong but I knew when I saw no heartbeat on the screen and I was spotting. Micarrying naturally can be fast and can also take some months to complete so only you know what your body is up to doing. I really hope that everything works out for you soon.
Take care