I've been through this twice—eating small, frequent meals instead of large ones keeps the stomach from being empty. But if you are vomiting constantly and feel dizzy, please go see your gynac for safe medicine.
For mild nausea, keeping dry crackers or ginger biscuits next to your bed to eat before getting up really helps. But if you can't keep any liquids down, talk to your doctor immediately.
Be careful with sweet ginger candies or juices to stop vomiting if you are watching your sugars. I used to suck on fresh lemon slices or sip plain water, but if it is too severe, definitely check with your doctor.
I'm so sorry you're feeling this way. Try taking tiny sips of coconut water or sucking on a piece of ginger. Please rest as much as you can, and consult your doctor if it gets too heavy.
