I am sorry for your loss Miss K.

I bled for a couple of weeks after my three D & C's - but my losses were much later. I also produced milk but not after my 3 first trimester losses. I haven't heard of milk production this early - but I am sure it happens.
If you got a pos preg test you would also get a pos opk - opk's will often show a pregnancy earlier than a preg test.

I think I ovulated about 6-8 weeks post D & C. I HTH.