I keep gaining and losing the same stone (14lbs) of weight within a week. I yoyo between weighing more on a monday, but then the following monday I've dropped again. Then as little as three days later, I've gained again. I've started wearing the same clothes, just a nightgown to check if it's just my clothes, and I've changed weighing scales to make sure I'm not just using a broken set. It's been this way for months.