*HUGS* I'm obviously not happy to see you here, but welcome
I didn't have any experience with a D&C, as my M/C was early and natural. But we didn't wait or take any precautions after the loss. I would think as long as you wait the suggested amount of time just due to the risk of infection etc that it would be fine to start TTC as soon as you feel ready.
I hope you get your BFP again soon, it's a really hard thing to go through, especially after getting pregnant with our firsts so easily