fever indicates infection, if your stomach is hurting it might be something harmless or it might be something serious, you didn't put a lot of details down such as what side it hurts what sort of sensation it is or how much pain your in on a scale of 1-10.When you’re feeling ill, your body temperature rises to help kill germs and infection. the active ingredient in Nurofen helps the symptoms of fever (including shivering and a high temperature) and inflammation. As fever is your body's mechanism to overcome invading germs, you only need to treat fever if you feel unwell. If you have a fever but still feel as if you can continue functioning without too much discomfort, there is no need to treat it. However, it's important to drink plenty of water to help replenish the fluid you lose through sweating. It's also crucial to get lots of rest if you need to. To help bring your temperature down, you could try taking a lukewarm bath. as for your stomach pain try putting a hot water bottle on it and go to bed and just rest in the most comfortable position you can find, take 2 nurofen liquid capsules every 4 hours, but if your pain and fever does not get better by the morning please go see your doctor.