Certainly! Here’s some advice for each of those situations:

1. **I'm hungry**:
- **You**: Consider preparing a balanced meal or snack that includes protein, healthy fats, and carbohydrates. If you’re in a hurry, try grabbing something quick like fruits, nuts, or yogurt. Remember to hydrate as well!

2. **I have a fever**:
- **You**: Rest and stay hydrated with water or electrolyte drinks. Use a cool, damp cloth on your forehead to help reduce your temperature. If the fever is high (usually above 102°F or 39°C) or persists for more than a couple of days, consult a healthcare professional.

3. **I have a headache**:
- **You**: Find a quiet, dark place to rest and try to relax. Hydrating is important, as dehydration can cause headaches. Over-the-counter pain relievers like ibuprofen or acetaminophen can help. If the headache continues or worsens, seek medical advice.

4. **I have a toothache**:
- **You**: Rinse your mouth gently with warm salt water to help clean the area and reduce swelling. You can apply a cold pack to the outside of your cheek to relieve pain. It’s important to see a dentist as soon as possible to determine the cause and get appropriate treatment.

5. **I feel sick**:
- **You**: Rest and take care of yourself. Stay hydrated by sipping on clear fluids like water, herbal tea, or broth. Avoid solid foods until you feel better but consider bland foods like toast or crackers if you're hungry. If symptoms persist, worsen, or are severe, seek medical attention.

Always remember to listen to your body and consult a healthcare professional if you're unsure or concerned about your health.