Thanks for your query The weakness is mostly a sequel to your fever. Eat a balanced diet with proteins , carbs healthy fats and lots of fruits and veggies For constipation eat prunes, raisins • Dried beans and peas • Popcorn ,Nuts and seeds • Increasing fluid intake according to your body weight and level of activity. • Increasing physical activity • Drinking a warm beverage first in the morning. For acidity issue Dont smoke , No soft drinks and alcohol Dont skip meals Reduce stress ,reduce caffeine intake. Reduce oily and spicy food Dont sleep within 2-3 hours after dinner By following these simple measures you will have relief of both acidity and constipation. Hope this helps