Sometimes, either the left side or right side (quite rare) of my chest starts to hurt and i can't sit nor take full breath for a couple of hours because if i do, it causes pain in this area. the pain usually feel like electricity?

You might be presenting with costochondritis,an inflammation of the area between the ribs and the cartilage.It’s often triggered by viral respiratory infections, trauma and, even a tight seat belt. It may last up to a year. A warm pad, light massage and time may help.Usually goes away by itself. If you cough with thick sputum or blood,have fever,or shortness of breath,or fainting,go to the Doctor.