I had BAD morning sickness and couldn't even keep down water. my Dr recommended half a unisom and a b6 vitamin. worked like a charm, it kicked in within moments and i could eat comfortably. i took it twice a day as soon as i started feeling sick.
Just try to stay strong and know that there is an end in sight. I had all day m/s for about 4.5 months and cried almost every day, but now I'm feeling much better and the best part is I can feel my little girl moving around and it makes everything SO worth it!! Eat what you can and don't worry about proper nutrition until the m/s goes away. Your baby will get all the nutrients it needs from you anyway and the prenatal vitamins will ensure that you both are getting the extra help that your body needs.
Re: Morning Sickness
Here are some suggestions:
Keep crackers by your bed and eat one or two immediately upon awakening
Eat many small meals throughout the day
Eat sour/salty foods
Give in to cravings
Eat a high protien snack (cheese or yougurt is good) before bed
Use unscented soap, shampoo, lotions, etc
Chew peeled ginger
Keep a lemon rind nearby and sniff when you feel sick