I'm so tired

"I'm so tired
I haven't slept a wink
I'm so tired 
My mind is on the blink."

I have no idea what's been going on, but I've been absolutely exhausted lately.  Ugh.  And here's the other thing I've noticed: "I'm so tired" is listed in lowecase on the back of The Beatles' White Album.  So is "Why don't we do it in the road."  Why is this?  The other 28 songs are listed in the traditional way.  And while we're on the subject, isn't it odd that there's a little baby noise at the end of "I'm so tired?"  What is going on with that?  It's low key and you really need to train your ear to hear it, but by golly it's there.  I'm not really sure why, except that it's kind of the theme of the album to mess with your head.  Job well done.