It's simple. You lost weight and became a habit, which affected your previous living habits, biological clock and habits. It's a little messy and I don't feel well. Now, you just need to make a timetable for yourself, when to eat and what to do every day, and gradually get into the habit. Eat well in the morning, eat at noon, eat less at night, exercise regularly and quantitatively, and don't overeat for a week. After that, you will recover. Don't overdo it. Good health is good. Now, you can.