Kidney infection?

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So I was miserable several days ago and felt like a furnace trying to sleep. But I was freezing. I took my temp and it was 103.2 so I went to the doc the next day and told them I knew I had a UTI but I think it turned into a kidney infection based off my symptoms. My back was hurting really bad right where my kidney is etc etc. They confirmed my UTI and said they were having computer problems so hand wrote me a prescription for antibiotics and rushed me out. I’ve been taking them and not getting better...checked my temp again and it was over 102 last night. Has anyone had a kidney infection before? What were your symptoms? I’ve had UTI’s and it’s never been like this. I called and they said to just keep taking my antibiotics. Experiences??