Mood Swings

I have to get this off my chest: The last few days, including my lesson, something really hit me - I feel like I have NOTHING to offer music anymore - like, what I do when I play or sing is all academic or mechanical, and there's no emotion behind it. I don't know how to put it any way else - I'm just really confused - I'm enjoying listening to music and watching it be performed live much more than actually doing it - I should be practicing right now, but I won't get anything done because of the mood I'm in...I'm so pissed off and confused because these damn mood swings don't give me a clear answer and I feel I'm not getting anywhere in life, period. AGGGHHH!! I'm lacking motivation and drive and, to go a little far, a lot of emotion in my playing - I feel like I'm just a machine, and if I'm going to do this, that's not what I want. I hate the fact that I feel like this same subject keeps coming up, but in different disguises - the basic questions of "what the hell am I doing, etc.?" Maybe I'm just destined to become just another musician, not anyone special - there are LOTS of people out there who are better oboists, better pianists, and better combinations, or any combo of those, so why do I try? I know that nothing worth wanting is easy, since life is just a bitch, but am I really cut out for this kind of thing? I don't want to disappoint anyone, including myself, but when I can't work because of these damn mood swings, it really pisses the fuck out of me and it's like a never-ending circle that won't leave......I thought I was getting away from drama when I graduated from high school...