HI 
Greetings from Dr.Divakara.P
Thanks for posting your query. 
      I need more information regarding your problem . 
Since how long you are having this problem? 
Is the pain continuous or intermittent? 
Does the pain increases after eating food?
Your sex ?
Any burning sensation or pain while passing urine? 
    Kindly revert back with these details. 
     The possibilities could be Kidney Stones, 
Appendicitis , Liver infection , Infection of gut , Pelvic Inflammatory diseases ( infection of Ovary , fallopian tubes or 
uterus ) , Partial 
intestinal obstruction, 
Kidney infection. 
    I advise you to get 
Ultrasound Abdomen pelvis , Urine routine test and revert back . 
Hope this was useful to you. 
Any further queries feel free to ask . 
Regards.