I started this medication 6 days ago for a UTI, and just this aft...

I started this medication 6 days ago for a UTI, and just this afternoon started developing a nasty rash. It has now spread to my whole body. The rash is not raised, and only a little bit itchy. I have a sore throat, dizziness, swollen glands, and feel like I am in a fog. I also have severe pain in my left shoulder and neck... the funny thing is that when the shoulder pain started a few days ago it was in my right side. My eyes are bloodshot, which I realized when someone asked me if I had been crying. I only have 1 dose left, but will throw the bottle away and never take this medication again.