Awake at 4AM...again.

So here I am, up at the horrible hour of 4AM...for the second time in 3 days.  My back is killing me.  Every once in awhile I get this....my mattress is horrible.  It's only about 4 years old but it sags terribly.   I virtually live with a heating pad attached to my back.  Usually I can take a Motrin and it helps...but being pregnant all I can take is Tylonel....yeah, that did nothing.  So again, here I am at 4AM, wide awake, on the computer.  Of course, Jon is fast asleep.