Because you are experiencing pain on the left side of your body, particularly in your chest, head, and leg, it is very important that you seek immediate medical evaluation rather than self-medicating. These symptoms require prompt assessment by a healthcare professional to rule out any serious cardiovascular or neurological issues. Please do not take pain relievers like ibuprofen or aspirin until a doctor has examined you, as they could mask important clinical signs. Please calmly visit the nearest emergency department or contact emergency services right away so doctors can perform the necessary tests and safely manage your pain.