I had it really bad last time, and it looks like that's where I'm headed this time as well. For the most part, I'm still experiencing just the "reassuring carsickness" feeling, but yesterday afternoon it moved towards "debilitating pukiness" for a couple of hours. Eating small meals frequently does help. Last time, I realized that if I waited too long to eat (too long could sometimes mean 1/2 an hour from the last time I ate), then when I *did* eat, I would throw up. Then I'd have to very quickly eat something else because after each time I puked, I'd have about a 15-minute window of feeling okay, and I'd need to eat in that window or else I'd throw up again. Discover which foods are easiest for you to eat without gagging, and quickly. Legend has it that crackers work well, but I find it makes more sense to eat a little protein if you can. Maybe a piece of cheese, or meat, or some protein smoothie.
What ultimately saved me last time was acupuncture. It didn't make me stop puking, but it got rid of the 24-hour nausea, which was acutally more debilitating than the throwing up. I'm having my first session tomorrow, I'll be 5 weeks pregnant.
Remember that "morning" sickness is a very good sign of a healthy pregnancy and a sticky baby. It helped me to remind myself of that each time I'd be hanging over the toilet. I was so sick that I could kind of forget what the point of all of it was, but picturing the little babies inside of me made it all feel worth it.
Hang in there!