I think you mean interstitial cystitis. I would wait to see what your reculture results are before you dive into an IC diagnosis. Though cases of IC may feel like a UTI (along with a host of other symptoms), IC sufferers don't generally have positive UTI cultures.

While IC sufferers have a higher incidence of conditions like endometriosis, fibromyalgia, and other chronic conditions I have never seen a connection to CRPS.

IC is usually diagnosed by a urologist or urogynecologist.

I have found in my practice that sometimes it takes the bladder a while to settle down after a UTI. Avoid acidic foods (like cranberry or orange juice). Sometimes an antacid (ie. Tums) several times per day can help.