Good luck ttc first. The fact that they have detected a heartbeat at 6 weeks is a positive sign and already lowers your chances of a mc. And the fact that you are having symptoms is good. My doc kept asking me that when I was about 6/7 weeks pg as it is a good sign as your body is interacting with your baby. I too lost symptoms a few days before I mc. But don't worry if you do get a loss of symptoms it doesn't mean you will mc. I remember in the early days of this pregnancy I would wake up some mornings and feel completely normal. It would freak me out but either the next day or the one after the symptoms would be back. And I lost most of my first trimester symptoms by 10/11 weeks. Stay positive, your lil one has a good chance of staying there. I hope this is your rainbow!