Firstly, I am so very sorry for your loss and the difficult times you have experienced. I have also had a number of D&Cs over the past few years (mostly for removal of polyps and some other medical stuff) so I went to a fertility specialist after the loss of my little boy as I also required 2 D&Cs to clear the retained placenta products and bled and clotted so much that I was very concerned damage was caused. My specialist said that numerous procedures can cause scarring of the uterus known as "Asherman's Disease" but it's not very common. My specialist is happy with my uterus and said he could pick up most abnormalities on ultrasound. My suggestion would be to get a referal to a specialist to eliminate any concerns.

On another note, having many D&C's with manual dialation can cause your cervix to weaken which is probably what happened to me (I have an incompetent cervix) so I would recommend you tell your OB about your procedures when you fall pg again so they can keep a good eye on it.

Take care and good luck x