Totally. I know people are desperate to know the sex, as evidenced by scrutinizing early ultrasound photos for signs of a nub, a slope of the skull, a placenta on one side, and so forth. But the truth is...none of these things work reliably. Chinese gender charts, swaying, a needle over the belly, whatever that cabbage juice trick was....those and all the ultrasound theory approaches would be used a lot more by actual people in the medical community if they worked with any remote reliability.
My advice, just be patient and get excited about your child without focusing so much on if they will be a boy or girl. You have their entire lives to shower them with gender expectations and plan nursery design and wardrobes and so forth. I was happy to find out what sex my child was, but to no greater degree than I was to find out anything about her, and much less degree than I was to find out that she was healthy, to all appearances.
I am so gratified to see how well the OP has taken this little hiccup because once you know the sex, you start picturing the child as that sex. I hope if I found out they were wrong I would be able to shift over as well as she did!! Good job OP!