Hi, I believe I am passing a kidney stone. While trying to go to sleep I had the sudden urge to urinate. My vagina (urethra) starting to burn when I urinated. I now have been sitting on the toilet for 4 hours with intense pain coming in waves when i try and urinate(which is always small amounts). This is the second time something like this has happened with same symptoms (except now is more pain in lower back and abdomen) I went to Doctor last time, she said UTI. Then results came back and it wasn't. The symptoms stopped a week later. This was early March I believe. I keep having the feeling like I have to poo and pee but really nothing is happening but pain. Also, when I wipe there is slight blood(happened last time too)