This is Dr. David
it sounds like you need to see a urologist at a larger academic medical center if possible.
you may benefit from decreasing stress and anxiety and/or taking anti anxiety medications.
you may need to drink more water and fluids and avoid caffeine and alcohol which can irritate the bladder
you may benefit from bladder numbing medications like Azo or Pyrldium which can turn your urine orange, but can numb up your bladder and can decrease some bladder pain
Azo is over the counter
have you tried these before?
let me know if you have other questions.
nausea can come from too much stomach acid causing gastritis or can come from excessive anxiety symptoms.
you may benefit from long acting benzodiazepine mediations like clonazepam or diazepam which can help reduce anxiety symptoms.
and also stomach acid lowering medications like prilosec or zantac or maalox/mylanta which can help
ginger also can help decrease nausea.
you may need to try other antidepressants to find the right one for you.
sore throat can be from acid reflux.
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your GP would have to refer you to see a GP at a university setting
they should do a biopsy of your internal bladder when you have a cystoscopy to prove if you have interstitial cystitis or not.
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