I have hives that that look like knot an itch like crazy even in my hands. I have taken Allegra, cetirizne, hydrochloride and prednisone which I cannot take it makes me feel like I am having a heart attack. He seen an allergist he has I answers all the test an blood work were negative. My face swells my tounge and large lumps come all over my body an itch like crazy. Can you offer some advice?