I'm pretty sure that aversion is a common learned response to situations of nausea/vomiting. People who've had food poisoning often develop long term aversions to foods they ate closest to the symptoms starting, even if that was not the food that made them sick. I can't imagine how awful it would be to be so ill week after week - that has got to have some long term effects somewhere.

Recognising that this is something you are dealing with means you can take steps to move through it. Chat to your GP about whether this is something you might be able to access a mental health plan for (there's a category of funding in there re pregnancy/birth trauma) and get along to a good psychologist. Then, you can take steps in future pregnancies to head your morning sickness off at the pass - start complementary therapies like ginger & B6 in standardised doses 3 times a day, acupuncture/acupressure, and even a low GI diet that keeps your blood sugar more stable, start these before the nausea gets a chance to take hold. Knowing that you have tools like these to minimise your symptoms might help you feel more positive/in control and reduce the fear factor.