I had pretty bad morning sickness for a while in my first trimester. I found that having sour candy, like lemon drops, helped when I was feeling sick. Having something to smell, like a tissue with a citrusy scent, can help as well. I had to have all of these things around me so I wouldn't start gagging while sitting in classes or on the bus. I had my school bag stuffed with a grapefruit scented cloth, suckers, sour skittles, lemon drops and water to help me when I was feeling nauseous. Try a few different essential oils and see if the smells can help ease your nausea. Try clean smells like lavender, peppermint or lemon. Eating a little ginger or drinking ginger ale (especially when it is flat) can help too.
Also, keep some snacks by your bed and eat them before you get out of bed and try not to go to bed hungry at night. This helps you avoid low blood sugar which can trigger nausea. I had crackers by my bed and would eat a couple and stay in bed until they settled. This keeps you from having low blood sugar when you get out of bed and can help with the nausea. High protien snacks are best before bed and high carb snacks are best in the morning. ((because protien takes longer to digest than carbs))
Supposedly you can try those copper bands that put pressure on a pressure point on your wrist to help with nausea. I haven't tried those but I hear they sometimes work.
Sometimes low lights and a quiet room can help. Just having a small snack then lying down in your bed for a bit might help you keep food down.
Finally, if all else fails, there are meds your doctor can prescribe that can help with the nausea. Most docs will take it seriously if you can't keep food down because you need to be eating properly for both you and your baby's sake, especially in the first trimester when so much important development is going on. Hope you feel better soon!