Blood in urine

Hello,
I had a recent urine test down and the doctor found blood in my urine. Has anyone else had this? I have had this before and they never found an answer but now I wonder if it is connected to my endo. I was diagnosed with endo in 2014. Just curious if anyone else has had this issue. I’m pretty sure my endo is coming back after my surgery in 2014 and it’s getting worse. I’m worried it’s on my bladder or kidneys.

Thanks