I have a phobia of being sick too. I know no one *likes* being sick, but yeah, I've had panic attacks over it. Ironically my anxiety about being sick has been the reason I've been sick or else felt a lot sicker than I would have done otherwise in the past. My physical reaction to being sick is traumatic - afterwards I'll be shaking, sweating and crying. When I found out I was pregnant, I was really worried about it. Reading that people were being sick 10+ times a day with morning sickness filled me with fear. I'd spend most of my day a complete wreck if that happened to me.
So, the moment I felt the slightest bit of nausea coming on - I ate a tuc biscuit (having tried ginger and plain crackers too, this seemed to work best for me) and sipped water. Then I tried my hardest to distract myself with something else, because the more I thought about being sick the more likely it would happen. If the biscuit stayed down I'd eat a little more. Then a little more - little and often. I kept things beside the bed so that if I woke in the middle of the night (which I did, frequently in tri 1 and the beginning of tri 2) I'd have something easily to hand and crucially wouldn't have to move too much to get it.
I avoided nausea triggers like the plague. For me that meant not having cooked meals for quite a while, and I stayed away from the kitchen if my other half cooked something. Cooking smells were guaranteed to set me off. I lived on toast, cereals, sandwiches, plain biscuits for a few weeks.
I've got through to 23 weeks without being sick. I've spent plenty of time feeling sick, and still do now if I haven't eaten for 3+ hours. But I've avoided what I was most scared of.
Got my fingers crossed for you.