My urine has been completely clear all day without drinking much fluid. it was also clear first thing this morning. i've also been abnormally tired .

There are a number: of potential disorders that could result in clear urine but the most likely cause is fluid intake that you have not recognized. Just to be certain however it would be important to be evaluated and have your urinalysis checked. Make an appointment to see your health care provider this week to see what is the cause of your concerns.