I agree with what you say, when I felt stressed and emet was getting on top of me nausea would increase. I had CBT and this helped me relax and drop some compulsive behavious which were really causing a problem. I have a book which I read "Essential Help For your Nerves" this book really helps my anxiety in general. I am also working through the Thrive booklet which I think is helping. I have only felt nausea about 5 times this month which is not bad at all.
How is your nausea now?