With The limited information available , I shall attempt to answer one of the probable causes for your exhaustion inspite of long hours of sleep. One of the possible causes would be obstructive sleep apnea where in a person doesn t get to complete normal sleep cycles during bed time due to blockage in breathing as result of tongue falling back or some blockage in your breathing pathway. The chances are higher if you are obese/ over weight. You need to find out if you are a habitual snorer as well. Typically a person may wake up several times at night ( which you may or may not remember ) but following a full night s sleep , one wakes up tired and exhausted with even a headache at times. Typically such people tend to breath through their mouths when this happens which causes excessive drying up of saliva and this causes reccurrent sore throat . They also tend to keep shifting positions in bed which may be responsible for your rib pain / pelvic pain. But to check whether what I am suggesting is correct , it would be advisable to consult with an ENT Specialist for detailed history and examination.