I also had what we think may have been left over implantation bleeding.. brown blood for a few days when i was 7-8 weeks!..Scan showed all was well!

Good luck with your scan!..one day at a time.. and no matter what, the anxiety never leaves just lessens and changes as the pregnancy goes on!..AND then after we have our little ones in our hands at the end, it becomes a whole set of other anxieties! lol never ends!