Suggest Treatment For Pain In Kidney Area,dizziness And Blood In Urine

I left my tampon in for 56 hours, and now I am experiencing pain in my kidney region, I have been feeling dizzy, like I am going to throw up and when I go to the bathroom both 1 and 2, It send pains up and down where my kidneys would be. I went to a walk in clinic today, and he said I tested negitive for an infection, however, I do have a little bit of blood in my urine.