Hi Jessey
Good luck with your scan... i would be asking to see someone else, infact i would call the hospital and politely inquire as to who is rostered on that day - do you remember her name? Anyway i would explain your situation and that you would feel very uncomfortatble if you were to be scanned by here again.
Althou i have never had a m/c i was terrified before my 12 week scan that there would be something wrong - i use to lie in bed at night and put my hands on my belly down really low where it would be sitting and think positive thoughts and send them to my baby - sounds a bit silly now as everything is fine, but i was so worried!
Oh yeah and your age shouldnt matter - infact if you are younger i would have thought that they would have been a bit more sensitive!
Good luck and i hope that you have a wonderful experience this time