What Causes Blood In Urine And Stool When Diagnosed With UTI?

i am a 30 year old male. have been healthy until recently approximately 4 weeks ago I was having blood in urine and stools and was diagnosed with a UTI. Was given antibiotics. After completing antibiotics I have been constipated and painful bowel movements with frequent urination. Currently feel abdomen is bloated, constant feeling to urinate. I was unable to urinate a couple of weeks ago, went to ER and they put in catheter. 3 days later followed up with urologist who removed the catheter and I was able to urinate. He said the inability to urinate was due to constipation. Over the past 4 to 5 days I have taken laxatives, stool softeners, prune juice and had one bowel movement which was constipation and very little amount and then yesterday had a little diarrhea and had an orange color to it. Both were painful bm s with burning in anal area and abdomen. Today, went to ER for the continual burning feeling in anal area and abdomen the cat scan shows no blockage, it did show a little air around appendix but because white cell count is normal and abdominal pain has been happening for a while dr s don t believe it is appendix related. Currently still having burning and pain around rectum and anus as well as in my abdomen along with frequent urination.