Gender disappointment

So I have two spectacular girls and on my husband side of the family it's grandchild -#7 and every one is a girl ... so the pressure to have a boy is quite a thing... I feel like I'm pregnant with another girl and we aren't finding out till birth as I don't think I can actually cope with the gender disappointment from other people . I know it isn't there baby and we will be happy with whatever but why do we feel like we have to have a boy :(