Excessive morning sickness

Hey, guys! I've been having severe morning sickness to the point that I can't keep anything down, I'm nauseous almost 24/7. It's awful. I've lost weight since becoming pregnant. The one medication my doctor prescribed is too expensive and the OTC knocks me out for hours on end. I've tried eating saltines, drinking plain and lemon water. Nothing is working for me and I can't take it anymore! What have you found that works for your morning sickness? Certain foods, medication, anything.