Hi mummytron, I too have microscopic blood in my urine samples (last time was about 6 weeks ago)and also visible blood in October 2023. It seems to be very common after menopause especially if you have VA.
It was all investigated, had a ct scan and cytoscopy....all clear.
I don't have enlarged kidneys....but surely if that was concerning to the drs it would have been investigated further last year.
Like you say all your blood tests were clear so take comfort from that, that is good news.
Please try not to worry, I know it's easier said than done.....believe me I've been were you are now and I know the wait is agonisingly slow but the ladies on here offered me brilliant advice and I got through it.
Good luck with everything and keep us updated x