Treated for uti but still feel very sick , weak limbs, muscle spasms all over body and very weak . did my uti cause kidney problems ? no back pain .

"Damage" unlikely: It often takes time to feel 100% again after treatment of any type of infectious process including a UTI in a 27 year old. Just stay the course with your medications, drink plenty of water, cranberry juice if that's your persuasion during this decade when it appears to be helpful, and remember, to wipe "Front to Back." If symptoms still persist within the next few days, call your doctor.