It is not recommended to lose weight during lactation. If you don't breastfeed, you can consider both exercise and diet adjustment, but it will take some time, not fast, and don't worry. The principle is that consumption is greater than intake. Have a good breakfast, 5-8 minutes for lunch and little or no dinner. Choose the proportion of three meals according to your physical condition. I suggest you focus on adjusting a balanced diet, strengthening exercise, relaxing and ensuring sleep. The principle of exercise is: step by step, do what you can, and persevere. I hope I can help you.