An FYI you probably already know: The thing about weighing yourself is that water weight isn't accounted for and can vary by as much as 5# from one weigh-in to another. Also, moving the scale around (say from against the wall to middle of the room) apparently can give different readings, too.
I have a Tanita & I wondered about it's accuracy as well. So I changed the batteries, put it in a spot where I'd be unlikely to move it & weighed myself AM & PM for 7 days, 3 times in a row. My weight went up/down by 1 to 1.5 lbs daily which I account for water weight. But my 3 times in a row weight was consistent each day. DOes that make sense?
I checked Consumer Reports but don't see a recent study about scales. They seemed to like Taylor for body fat accuracy and Tanita for weight. I've heard the ones in the doctor's office are most accurate, but they are big $$$. Long story short, I like my Tanita scale.
Stay calm and carry on.