I wouldnt read anything into your symptoms being less, I think everyone is different.
Surely if your doctor sees how concerned you are he will refer you? And I know how scary it is, honestly, when I was getting my scan done I was in tears before i even went in the room, but I would rather have known early on if there was a problem, however scary it would have been to face.
I think it sounds like everything is fine, the spotting thing seems to be quite normal from what i read. And you have 2 positive tests which won't be wrong.
I hope they give you the scan, I'll be thinking of you until I hear more.
Jacq xx