My Daughter Had High Fevers For 7 Days And Suspected

My daughter had high fevers for 7 days and suspected sinus infection. She was prescribed amoxyl forte and woke up with big rash back of leg and feeling lethargic. Doc suggested allergic reaction then prescribed rulide. She began having serious cold night sweats ( needed full change every couple of hours) and last night had severe sweating cold and low body temp 35.3 and could not get it up from 11pm - 5 am . Should she go to hospital ??