Who knows? Possibly it's that you're not doing anything, as you say you're bedridden, so you're not burning what you usually do. You're also learning the problems of so-called keto diets and other high protein diets -- the weight loss doesn't stay around, so if you stop what you were doing, which you did, they stop working, and this is also going to likely happen if you decide to return to a healthier balanced diet than high protein diets offer. I wouldn't worry about it, it's only a short-term thing most likely, but it does tell you, at some point you are going to stop this diet and return to a more normal eating pattern because we all do that, and these diets have not done well in long-term studies or for health. So when you do go back to eating a diet more balanced with those high anti-oxidant carbs you might have to also increase your output of energy, such as by increasing the amount you walk, decreasing the amount you drive, and increasing exercise. Eventually, your metabolism will even out again, and if you stay on your way of eating before you got sick and return to activity I'm guessing you'll also return to the weight you were at as the body will seek its current balance. So get better and don't worry about it. Peace.