I suffer from migraines too- and they usually come with nausea. If it helps, what I do is I keep extra of whatever I can get down set aside for those days. And when I can’t eat anything else, I’ll do those. Vegetables keep you from being constipated but if you need to skip those for a few days- it’s okay as long as you’re getting at least 3 packets in. I’m sorry you have them. They can be debilitating (The safe packets for me are the vanilla ready made shakes over ice or with coffee, sea salt &vinegar chips and lemon water enhancers) Sometimes I’ll need to have 3 shakes a day and can’t get anything else down. Once I’m over the worst of it, I’ll eat plenty of salad and extra water for a few days til I’m back to normal. It’s okay to do what you need to do.