So ive given up diet coke as i was drinking far too much of it (2litres a day if not more) well now im on day 7 and not one drop has passed my lips but im sooooooo tired, in fact i could easily go to sleep now and its just gone 4pm. Im forever yawning and hubby says im moody since ive give up. Has anyone else found this?? or could this be as my mum says the actual toll of my excess weight on the body and the caffine has just been masking it. Has anyone got any tips for feeling more energised?