Re: Ultrasound and cystoscopy terror
well, let's relax and take a breath. Trace epithelial cells in urine are quite common and can be present even in the absence of bacterial contamination. Traces of blood can also be common as well and the fact that you have cystitis could increase the potential. That's the inherent danger in home testing; it's interpreted by lay persons. These tests are merely a guide to provide you with a general screen, not professional diagnosis. Always remember that.
Relax and wait for your cystoscopy. It'll turn out fine. I'll add here that the only thing "sinister" about discovery is the absence of it. Never take early detection of any medical problem as something to avoid due to fear. It's where medicine is making the most tremendous strides these days. That's largely why the home screen tests are so widely available and popular.
You'll be fine.
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Best regards and Good Health