Forgive me if you have already mentioned this, but have you had any allergy testing from your stable of doctors? Of course allergy tests are pricey. Yes I understand price is a consideration. I also have Allergic Contact Dermatitis and am loaded with allergies but truly have not read GD is allergy related. Yet it seems those of us with skin diseases have several types and accumulate them as we age.
I also meant to mention that like you I do not discuss my lengthy issues about my health issues with others and also try to spare my husband and family, not even close friends really want to hear it. Others feel helpless and all it does is drag down the mood listening to us go on about our itches (which they can't feel and simply can't understand the misery of 24/7 intense itching) and pain. We listen. Unload on us. We're here for you. We get it. My husband rarely asks and if he does only then do I tell him. I will always mention if I am having a great day. My son will ask sometimes, but his busy life with 5 kids has his mind off in other places, I prefer to hear him distract me with his tales of the joy, chaos and inevitable destruction of property the active kids (4 are boys made in the mold of Dennis the Menace) create in his life. One repair after another.