Gender Confusion!!

I’m looking for some advice - I had my 20wk scan at 23wks and the tech told us she was 80% sure we were having a girl. (Already have 2 boys) I had a follow up scan today to double check babies heart and the tech told me nope she was 90% sure it was a boy. There was a little nub between the legs. I personally am convinced after her that it is another boy but just wonder did anyone else see a nub of sorts and it be a girl? Sorry I don’t have a picture!