@LetsBeSensible My energy levels feel normal for me. I have never really been affected by the crippling fatigue element though. I do feel like I am able to do more tasks in an one-er if that makes sense at all? For example, when once upon a time I would give myself one task a day, I now feel I am functioning fairly normally. I am working full time, and at my usual capacity.
@Criticallythinking I always had a hunch the gut was the key to this. I know the antihistamines are doing some good, but essentially I think this is all to do with gut health. Today I have started taking DAO supplements to see if this will assist. I intend to do this for a week and see what happens.
I feel the apple cider vinegar is working a treat. I think, essentially, what has been happening, is that some foods are not being digested correctly, and this is causing the histamine intolerance.
I do worry that the antihistamines will start to lose potency against the reaction, but if this happens I'll switch to fexofenadine.
I asked my GP for an allergy and DAO test, no cigar. He did prescribe me an epi-pen though! I have an appointment with the Infectious Disease dept coming up some time soon, so I might ask them to refer me to allergy specialists. I think that is absolutely what's needed now, allergy and gastrointestinal investigation.
I do feel this is the right path...finally.