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This is Dr. David
it sounds like you might be worried about a urinary tract infection if you were urinating a bit more frequently with a bit of fever.
you really should see a doctor at the hospital or urgent care center and get a urine test to check for urinary tract infection.
they can do a urinalysis and urine culture to check for infection.
this is better to know before you start to take antibiotics so you know what is the correct antibiotic to use for your infection.
you may not have a bladder urinary tract infection.
i know you are scared of sepsis and infection because you have had bad infection in the past.
you can also buy home urine test kits like Atlas Urinary Tract Test where you can test your urine at home and see if you have a bacterial infection
if you do have a bacterial infection, you would still need to see your doctor for prescription for antibiotics.
let me know if you have questions.
let me know if you would like me to call you in the UK.