I wouldn't know if the situation is any better where you live, but as you do not have classic allergic symptoms, it's much more likely you have food intolerances.
I've had some intolerances picked up through vega testing. I spent about £200 on seeing a very highly rated alternative practitioner who also practices as a conventional doctor. He was a lot more help than a conventional doctor.
I saw a holistic naturopathic nutritionist a few months ago who picked up a few things like possible magnesium deficiency. So they can be worth the money. She doesn't have a medical degree. She used to be a police woman but got very sick with IBS and chronic fatigue. After she managed to cure herself through diet she changed career to help others with nutritionally related problems.
I recommend you cut out sugar, wheat and dairy for a month and see what difference that makes, before investing any cash in seeing nutritionists or other health practitioners. You're probably reacting to other foods as well because your gut lining is damaged and your body in a general state of inflammation.
Poor bowel function has become so widespread in the UK population, it's now accepted as normal. I'm sure the main reason is that people are eating far too many grains these days as well as far too many processed foods.