You will need to explain a bit more about what the pain feels like, exactly where it is (lower/upper abdomen, left sided/right sided etc). Are you on bc pill? That can cause stomach cramps. Is it around a certain time of the month? Does it sting when you pee, running a fever, things like that..... More people will be likely to help
Since you have a fever, you may have an infection. Are you having diarrohea? There is a number of things it could be in that area. Have you tried going onto web md symptoms checker and selecting your symptoms?