In some cases, headache and nausea are signs of a serious underlying health condition. You should seek immediate medical attention if you experience a very severe headache, if your headache and nausea worsen over time, or if you experience any of these symptoms along with your headache and nausea: slurred speech ; confusion; dizziness
Drinking milk before bedtime is a folk remedy for people who suffer from acid reflux and heartburn during the night. Milk has a soothing effect on the stomach and throat, providing temporary relief. But milk also has a rebound effect that can cause heartburn later.
Milk and other cows' milk products are a good source of calcium. But frankly, you don't need to drink milk at all if you don't enjoy or tolerate dairy products. And you certainly don't need to drink whole milk when you're nursing.