I'm no doctor, but I think most of the time if you are that far along in pregnancy when you experience a loss, they want you to wait a few cycles to let your body recover. Because it is quite a trauma to the body. But my new doctor was talking to us about trying again, and he was saying to me that it wouldn't hurt to be pregnant before I got my post m/c AF, and I asked him about loss again. He said "Well, my brother is 10 months older than me, if that tells you anything!" So, it's possible. I think it all depends on you. Let yourself have some time to heal, but when you feel ready, go for it!
I'm so sorry for your loss! But this is a great group of ladies that have all been there and completely understand!