Hi Carolyn,

Do not post this - it is just for you. In case they do not find bacteria, something else to consider is ALLERGY.  I had something that presented as UTI - really bad urge to visit the bathroom, irritation you know where, but nothing in the urine.  I lived for 31 years in Bulgaria and used tons of different soaps and detergents and never would have suspected that a DOWNY fabric softener can cause such a misery.  I began using DOWNY after I married and came to live in the US.  I was really miserable, you don't want this just after getting married :)  The american doctor did not find anything so I did not get antibiotics.  Luckily I switched back to unscented softener, because my husband preferred it.  At that time I was not suspecting the softener.  Then a year later my friend came to visit so I again bought the fancy smelling DOWNY and again got the same UTI-like symptoms.  Took me a awhile to suspect DOWNY but I was really relieved when I found the culprit.  
So my advice to you is to try to find unscented everything - soap and detergent especially, and also if you are using pantyliners either find unscented or just forget them for awhile.  You never know what chemicals might be that can trigger a reaction.  Sometimes you never notice a reaction to a product for years because you gradually build a tolerance to it, but when you stop using that product for some period and reintroduce it again, you have a strong reaction.  (Actually this happened to me as well - toothpaste - I never knew that it was not supposed to be tingling and was tolerating it all my life, but when once forgot mine on vacation and used my husband's for a week, returning to Aquafresh caused my mouth to swell.  Again took more than 2 weeks to figure it out.  The problem was the mint. Thank goodness they have non-mint flavored adult toothpaste here otherwise I would have been reduced to using my son's one :) )
I hope you get this issue resolved.  
I really enjoy reading your blog.