Allergies Question

four years ago I suddenly got a case of severe hives last lasted eight weeks. Oral steroids, steroid injection, and antihistamines could not control the rash. I had Allergy testing done and up negative for allergies. It was also noted that I had a goiter but thyroid blood work came back normal. After the eight weeks the hives suddenly stopped and my doctors passed it off as a freak thing with no explanation. Since then I have had more random allergic type reactions, hives, other rashes, eye swelling shut randomly, tongue swelling.
It has recently gotten worse with my tongue swelling daily. Not to the point that I can’t breath but to the point that it is uncomfortable and my tongue is “scalloped”. After four years of these reactions I tried again to find the cause and spoke to my doctor about my concerns. She ran a CBC, TSH, t4, t3, Hepatic Panel, checked vitamin D and B12 levels, and it all came back normal but I’m still having reactions. Any advice on what to do from here?