WTF!

I weighed myself last night before bed and again this morning right when I woke up. I wanted to see if I weighed less after sleeping all night etc. I weighed 5 lbs more this morning than I did last night!!!!! What!!!??? How can that be??!! I HATE SCALES! I need to get a more reliable and accurate scale. Maybe a digital scale that measures ounces as well? I hope that this was a single isolated event that is related to a "wonky scale!"