i cant imagine how its messing with your head but i'd prob be trying to book in one of those 4d scans to check again and try and get a better confirmation.
there seems like there are quiet a few stories.
at our 18wk scan the sonographer looked at the scrotum first, then found the penis. well i didnt get a pic of it and to me it wasnt as clear as day as my previous 2 boys but even though the penis was not a definate the scrotum pretty muh was.
my ob also confirmed boy on thurs but i'll prob still go and get another scan just to triple check for myself lol!