If you have been experiencing stomach pain, diarrhea, and other symptoms for more than a few days, it may be a sign of a gastrointestinal issue like a stomach bug. It is generally recommended to consult a doctor if you experience symptoms like fever or blood in your stool. In the meantime, it is important to stay hydrated to prevent dehydration. You can consider trying a rehydration solution from the pharmacy and possibly probiotics if the symptoms persist. If the symptoms continue for more than a week or if they are very uncomfortable, it might be a good idea to seek medical advice.