Try alternative medicine. Try finding a chiropractor that does applied kenisology. AK.
See if the chiropractor does additional techniques such as NAET AND/OR BRT, body restoration technique.
Also, before I was diagnosed with Celiac Disease, I had similar symptoms. I got a blood test specifically for Celiac and learned that my results were high. Due to Celiac disease, I got a thyroid condition and was achy, cold, and loosing hair.
Both NAET and BRT have helped me greatly.
More good news. Both NAET and BRT can help the body build up tolerance. I have also used these techniques for more than allergies. For conditions such as rashes, viruses, bacteria, lung and cough, blood sugar, inflammation, arthritis, metals, thyroid, CELIAC disease, and exposure to pesticides.
Good luck