I have a very itchy rash, maybe even welts, all over my torso, going up into my scalp. Finessed 7 days of pennacyln for a sinus infection. Thought it might be a allergic reaction. Was trying to find it on internet. Did epsom salt bath, pouring calamine lotion as well as witch hazel. Been stressed. Took benedril otc this am. Tranquilizer this aft and allergy pill otc as I do every morning. It is still spreading. Walk-in clinics are closed . Do I need to go to hospital. 75 yr old female, never had this before. Rash is pink