Document misssing text after file save

Question

I am a student and a creative fiction writer.  I do an enormous amount of writing and saving documents perfectly,  and printing the papers, knowing how imperative they are for school, is somthing I just have to rely on with knowing that my saved documents are going to reopen with everything I typed.  I have a private journal. I started it a week ago,  I am now at 169 pages, that's 28,777 words of raw unedited manuscript.  I saved it cause I finally had to go to sleep.  I opened it today, and a huge chunk of the final paragraphs I had writen the night before, are not in the manuscript!!  What my worst fear was, in buying Pages, as a Mac word app., and not the Microsoft Office, which I have always relied on before buying my Mac earlier this year, was the fear that it was only 5 dollars to buy with my computer.  I was being persuaded by the Apple store salesman, that I didn't need Office for Mac, which is 120.00 dollars extra, I only needed Pages.  So, where is the rest of my file? This Journal, is not anything that I consider as so special, or unique, even with a few notes about an idea for a story, included, it's just rambling descriptions of thoughts coming out of my skull.  It's wild and out of control, rambling from one experience or topic, started, and interupted between the main topics, with whole and entire stories in and of themselves.  However,  I do see a therapist twice a week.  He suggested that I write these things down, because he's read my writing, having known me for seven years now, and the theraputic writing would be better, than being in a hospital for depression.  So, therefore this paticular piece is of a certain value.  It also is a well known fact, that famous novelists, don't simply sit down one day and write a book, and they are now famous.  They like all others before them, write, and I mean write, like a lot. 
    If you want to be a writer, and you don't do a ton of writing, like daily, it just ain't gonna happen for you, pal. I'm sorry about that, but writing professors, students, famous, unfamous, all persons considering themselves as writers, write a (7879689, load of writing!  They even have "Workshops", writing vacations.  This is a vacation that costs a fortune, a for the week long gathering of teachers and novice writers, who spend a week in  the beatiful Cape Cod, area with very luxurious food menus, and in between eating and sleeping, they critique their work.
    It's called polishing your craft, how cheesy and elitest sounding!
    I digres, an overwhelmingly bad habit of mine, which frustrates all the individuals unfortunate enough to receive my e-malis.
     So, if anyone can explain to me, why a chunk of my manuscript is missing, I would appreciate some help.
Sincerely
killer.

Answer 1

It is just text, nothing else?
Peter