Itunes Library on iPhone 4S keeps disappearing on my iPhone only

Question

I recently purchased the 64 GB iPhone 4S. All of my music is in iTunes on my Macbook Pro.  After I activated my Iphone, I synced it with the Itunes on my Macbook Pro, and I put all of my music and some of my podcasts onto my iPhone, about 37 GB worth of information.  Not certain if it makes a difference, but I have clicked the box that says to sync my Iphone over wifi, although it never works (I always get some sort of error, even though I use a secure wifi in my house), and I have my stuff backed up to the iCloud, although I have not really explored that function as much.  As far as the computer tells me, all of my software is up-to-date.
About one week ago, I plug in my earphones to listen to some music on my Iphone on my bus ride to work, and there was nothing listed in the entire library of the iPhone, no music, no podcasts.  When I got home, I plugged my Iphone into my MacBook Pro, and when I clicked on my iPhone icon on the side of the Itunes display, it indicated that all of the music/podcasts were on my Iphone.  It said that the 37 GB of information was there, even though I could not find it on my Iphone.  I tried turning my phone on and off, pressing the "sync" button on my computer multiple times, etc.  Each time I "synced" my Itunes, it said everything was ok, but I could not access any music on my Iphone.  Eventually, I think what I did was I unclicked the music and podcasts to be synced and synced it, so that the iPhone and the Itunes on my computer consistently said I had no music/podcasts on my Iphone, then I think I reclicked them and had to resync everything, which of course took alot of time.
Then, it happened again this morning.  So far I only did the above fix with the podcasts as I was rushing to work and did not have time to resync over 8000 songs.  Again, my iTunes on my computer is telling me that everything is synced and that everything is on my iphone, even though I see no music in my Iphone's music library.  I did notice last night, that my computer kept telling me that it could not sync over wifi with my phone (as I have said before, this has never worked for me), and that I should reformat my iPhone so that it was returned to its default settings.  I ignored this issue and, like I wrote above, when I awoke this morning, I had a nasty surprise.
I apologize if the solution is up here already, I searched for about an hour and could not find a question on all fours...but this has now happened two times and is not only irritating, but making me think there is actually some issue I should probably address.
Thanks in advance.

Answer 1

It's happening to me too.  Various songs go missing from albums and now whole albums are disappearing. To get them back, I have physically attached said 4s to computer and opened iTunes and clicked on all of the artists who are missing and have hit the apply buttons. They then reappear.  But they go missing again later. Am about ready to call Apple to see if they have any suggestions. I thought if I didn't sync my phone, they'd stay on my phone but no such luck.