Babylove, I am exactly the same way, I have 2 girls now, and can't see myself with a boy.... I just can't see it... and it scares me so bad!! I know I will love him if this baby is a boy, but I have the same feelings you do.... all the babies on my hubbies side are girls, and my house is filled with pink and princesses, and dance class and softball.... where would a boy fit??
anyway, its perfectly natural... I think a lot of us have those emotions and strong feelings about gender....
on another note, I have been thinking about boy and girl names for my little one..... I already know if its a boy he will be Peyton Darrin (after DH, its a family thing to have dads 1st name as middle name for the 1st boy)
and if its a girl, I just really don't know, I am thinking of Lilly, or Maymie(family name) with a middle name of Paige.... or I really like the name Aribella, or Erienne.... any suggestions would be lovely