I am 55 years old. female. sometimes when I urinate, I find alot of white tissue like particles. This has been going on over 4 years, I to;d The Dr. I even took a picture of thiis on my cell phone to show the Dr. I am nervous.my Blood pressure is low, has always been low, I am on meds  for  my B.P. I know what is going on, no one seems to know either.This has got me to the point, how do I catch these particles, to let someone believe me.