could gender scan be wrong? it was 18weeks 3 days

Ashley • 👣SAHM🍼﹏∞wife∞﹏🍷Italian﹏Pisces♓ ﹏🌴BeachBum 🌊﹏
Tech said a boy, and I do believe her, however, is it possible that the little girls parts are just swollen??? my prior scan it looked like little girl parts! everyone thought we were having another girl. lol. but, 2 days ago they said boy. just trying to be 1000% sure!