A new level of tired

Will is 6 1/2 months old now.  He still hasn't slept through the night.  If you had asked me yesterday if he had slept through the night yet I would have said that yes, he had for the last two nights.  I would have been wrong.  For the last two days I have been exhausted but not understanding why since I thought Will was sleeping through the nights.  Guess what!  I am so tired that I couldn't remember waking up to feed him!  Hubby would go and grab him when he woke up, wake me up and I would sit up to feed and cuddle him.  I was actually waking up every 3 hours to feed him just like normal, but I am so tired that I didn't know it!  Awesome, yes?  Hahahahaha!