Can be many things: You really need to get a physical exam and possibly some testing, infection can be suspected but can't be diagnosed without testing.
Answered 11/3/2012
5.5k views
Certainly could but.: Uterine or tubal infections can back and sacroiliac pain secondary to reactive arthritis. But the differential diagnosis can include colitis, crohn's, and many other diagnoses. I am also troubled by your not receiving emperic therapy. You may need to see another doctor particuarly an ob/gyn!
Answered 12/9/2013
5.5k views
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