My 10 year old daughter was given Bactrim at an ER for infected...

My 10 year old daughter was given Bactrim at an ER for infected bites. Within a couple days she was running a 104.8 temp that would not go away and from her knees up she had a rash with whelps that was driving her crazy. She was pale under the rash and every bone in her body hurt. We rushed her to the hospital and she was admitted. They said her blood palates were low and her white blood count was low...then her potassium also dropped. We spent 3 days and 4 nights there. Today we go back for a check up with her doctor...and I will express my concerns about the kidney problems I have read about today. I am now warning everyone I talk to about this drug. Seems the more I share her story the more people I found out this has happened to ..I feel like I should of been warned of the side effects of the medication