Oh no... I got to work and my iPOD is empty! What happened?

OK, so this morning I plugged in my iPOD as usual to my MacBook, which should sync my Podcasts only and leave my music and TV Shows.

However I also plugged in my MacBook to my external HDD this morning to do a quick 'consolidate to Library' to ensure my new downloads and podcasts I want to keep are copied to the external HDD. This should not affect the contents of my iPOD!

I did nothing else, and now find all my data gone from my iPOD, except Podcasts and TV shows. No music! I am so upset, because I really rely on it to get me through my day...

I'm also worried when I get home tonight, that my iTunes library will be damaged in some way.