Hello Madam, I understand you did get most of the common work up for right sided abdominal pain. I am happy that you were cleared of appendicits and ovarian causes. I hope you got CT scan to get that ruled out. If anything else major causing your problem, that would be shown in the CT scan. Also, as you know, the urinary tract information can also cause abdominal pain that should be resolved after it is totally treated. I would recommend you to keep yourself hydrated enough if this is the only problem. The other reasons in an young woman to be considered for abdominal pain are irritable bowel syndrome and any muscle spasms. If it is a irritable bowel syndrome, the abdominal pain is more likely to be associated with alternating diarrhea or constipation and may be related to any stressful factors in the life. If it is a muscle pull that is causing your back and abdominal pain, it might get better with warm compressions or a muscle relaxant which you can get after seeing your primary care physician. At this stage, I would recommend you to keep hydrated and finish the course of antibiotc for uti. If it does not get better after a couple of days, may be you may have to be re evaluated by your primary care physician for possible other causes as I discussed above. Hope this helps you to some extent.