Bactrim and palpitations

I started bactrim for a mild UTI. It was a 7 day dose, twice a day. I've never had any problems with any medication before. I finished all the pills on Tuesday, and woke up with a rash all over my face, neck, arms, stomach, back, and thighs on Thursday. All day I was feeling weak and near fainting when I stood up. I had chills, itched, and yet was hot at the same time. I believe I had some palpitations. Also a fever and swollen lymph nodes all over my neck and upper back. As the day went on the rash spread all the way to my feet and it went from blotchy to solid red. we currently don't have insurance so I'm pretty much currently stuck this way. My whole body itches, tingles, and I can't sleep.

DO NOT TAKE THIS DRUG ! ! ! I would not even risk it ! I would much rather have a UTI !