For sure boy? What do you think?

Had a scan yesterday at 16w4d. I saw the PA and she said they always tell their patients they aren’t 100% sure so that they don’t come back upset or anything. She was able to put this in an envelope and said boy? I have another boy and we found out at 20weeks with him as well as my girls. I guess I’m just second guessing. What do you think? I have my anatomy scan next month.