I'm so sorry for your loss Ames.
My situation was not quite the same as yours, but I had the same fear of Ashermans.
I had an ERPC following a MC (my second within a period of a 4 months), and it took over 10 weeks for me to have a period. When my periods finally did return, they were not as they had been before - I had a few hours of light brown/reddish discharge, nothing else. I had previously had very normal, regular periods.
Because of this, and the fact that I was getting some horrible pain with my 'period', I was very worried about the possibility of Ashermans.
I was eventually referred to a gynae who happened to specialise in miscarriage, and he arranged blood tests which were to be followed by a laparoscopy. I ended up pregnant before any invasive testing though - something that I really had convinced myself couldn't happen as my periods were so very light that they were almost non-existant.
So, I know the situations aren't exactly the same, but I just wanted to let you know that there is someone else out there whose periods changed entirely following a D&C, accompanied by very bad pain, and that ultimately it made no difference to my fertility even though I was convinced it had. I don't know what caused those changes, as the testing never got that far, but DS2 was born safely 2 weeks ago.
I think I went from ERPC to referral in 5 months, I saw the consultant a few weeks later and testing started straight away.
Wishing you luck and strength x