"I felt rushed"

I went into hospital just over a week ago, I went in with a really bad lower bad pain. I had a scan done which was found to have a kidney infection and put on antibiotics for three days. Then the doctor then thought that I had a rare or something going on then the back pain came back and I told a nurse that I thought my kidney infection had come back, so they did a second dip test which was positive and that I needed to go back into antibiotics but the next morning the doctor told me I was going home that day.

I then said what about my kidney infection and the reply I got was that I had antibiotics last week so I will be fine, I came home that nigh and I've just seen my own gp who has told me yes I've got a kidney infection and that if the antibiotics don't work which he thinks they won't I've to go straight back to A&E I'm really not happy