So on Monday morning we went to Tan Tock Sing to see the immunologist. His answer to my condition did not surprise me a bit. It was 'No solution, no answer and no cure.' He labeled it as Idiopathic Food and Environmental Intolerances/Sensitivities.
He also said to slowly experiment in new foods and to also get rid of the mentality of being afraid to try/being afraid of going into shock.
He said that it is unlikely for these reactions to food to result in an anaphylactic attack.
As for eating out, he told me to find a restaurant that would specifically cater to my needs and to stick to only one place and not go all over to eat. Eating out is a problem as there are too many herbs, spices and additives which are used. Even a change of chef on that day could pose a problem. He told me to only go for 'bland-outside-food'.
As for now I will maintain my normal way of living until I-don't-know-when...