I went to my walk in doctor today, because I was getting pains when I would urinate almost like are urinary tract infection or possibly a kidney stone passing I am a male, but now I am noticing tissue coming out everytime i urinate with a little bit of a blood at the end of it, doctor prescribed me bactrim in case it was an infection. was not having the blood and tissue when I went to see him this morning and now I m experiencing the blood and the tissue, can t tell if the tissue is white or if its got blood mixed in with it and that s why it looks like a dark color,I did pass a kidney stone about a year ago and did experience a little bit of blood and some tissue when I urinated but not the type of tissue and the amount of tissue that I m experiencing now, could this be possibly a stone orchid the tissue and blood be from an infection