PZ - my first pregnany ended in a m/c too, so when it come time that i was pregnant with DS my Dr kept reassuring me that the next time i got pregnant everything would be alright i would carry the baby fullterm, so when it come time i was pregnant with DS i tried to block out the negative thoughts and focused on what my Dr said that everything would be fine this time around and it helped ease my mind (didnt take away all of it) i would still go to the toilet and always exspect to see blood, well it never happened and i had a gorgeous healthy bubba 9 months later, so what i guess im trying to say is STAY POSITIVE!
Early scans only help ease your mind for that day mayb a couple days after then your worried again, its all about staying positive and trusting your body/baby

BTW by 10wks your have a very high chance everything is A-OK
Can i must say thanks to gorgeous Green Tree Frog (althought i dont think shes around anymore) her saying was

PREGNANT UNTIL PROVEN OTHERWISE!!! And believe in it cause you ARE pregnant until proven otherwise!