I Seem To Be Having An Allergic Reaction To Something.

I seem to be having an allergic reaction to something. I think it is the generic Benicar. I cannot take Benicar HCT because I get the hives. Allergy to sulfur drugs. Is it possible the drug store gave me the generic Benicar with HCT by mistake? My issue is, I cannot reach my doctor till Monday. Should I continue to take the generic Benicar? I am afraid to stop. Blood pressure normal with medication. I have been taking Benicar or the generic for 10 years.