Had a uti with left side kidney pain and for 2 days there was blood in my stool, dull ache pain getting a ct scan once get appt what could be wrong?

Need thorough exam: You have several things going on that need to be addressed by a doctor that you've identified with your uti, kidney pain, blood in stool, achy pain. All things that point to needing a doctor to examine you completely, and come up with you diagnosis and plan, by integrating your findings. Depending on how much blood's been lost, and whether it is an internal or external finding causing this.