If your dr cleared you, then you can start ttc again after 2 weeks. I waited for my next cycle afterwards because I was not ready emotionally to try again. This is my 3rd cycle after it now, and this is the first one that I felt I was ready. Wait until you are ready, don't rush it. I tried last month before I was ready, and when af came and I realized I want pregnant, I was devastated. It was almost like going through another loss. It will get better with time.
I'm sorry for your loss. I haven't had a DnC but I've heard your safe the have sex 2-3 weeks after it is done. Good luck on your TTC journey, I know how it feels after a loss.