From the symptoms this looks like blood in urine. Kidney stones are one of the commonest causes of su8ch symptoms but it has been ruled out in your case.
Blood in the urine can present in one of two ways: gross hematuria (blood that you can see in the urine), and microscopic hematuria (blood that is only seen when the urine is examined under a microscope). Both types can have serious causes. If you are passing different-shaped clots in your stream, they could represent bleeding from the urethra. Clots can be wormlike, and if associated with pain it could represent clots coming from your ureters(tubes from your kidneys to your bladder).
When the blood in the urine is at the beginning of urination, it most likely comes from the urethra, (the tube from the bladder to the outside). Blood throughout urination is most likely from the bladder or kidneys or ureters (the tubes connecting the kidneys and the bladder).
Diagnostic tests that may be performed include Urinalysis, Urine culture, X-rays of the kidneys, Cystoscopy, IVP, Abdominal ultrasound and CT scan of the abdomen.
I sincerely hope that helps. Take care and regards.
Thank-you so much for taking the time to respond to my question.
I have since had an abdominal and bladder ultrasound. It confirmed a cyst on the liver, which I was told no treatment was nesessary for this, and the ovary and kidneys, etc seemed normal according to the doctor doing the ultrasound. I am scheduled to do a cystoscopy soon. I will keep you posted.
Thanks again for all your advice, I truly appreciate it.