Hi Mikki,
Im so sorry that this is happening to you
Lots of us have been through the same sort of thing. I know that doesnt help at all, and I know that when people start going on about it being common it wont help at all, but just know that were all here for you if you need to talk.
I had a mc on the 31st July, I had the same sort of thing as you - I was meant to be about 9 weeks at my ultrasound, but the baby had stopped developing at 5 weeks 6 days.
My body didnt realise this however, and so I was booked for a dc, but It ended up happening naturally the night before I was booked for the dc.
I can empathise with your feelings of being lost and alone, and I too have a very supportive partner, but I think its just hard for them to understand the intense emotions that come with a mc, and sometimes its just too hard to talk to someone face to face about it.
Just know that you arent alone, not at all, and although we are all only online we are all here for you.
Danielle