Helplessness, and dealing with it

Hmm, dun you ever feel helpless at work. well, i do. all the 5 yrs i've been studying medicine, i jes feel kinda tired and helpless when i see sths happen to my pt. nutting i've read has prepared me for this world, not that i wanted it in the first place tho. at most times, i kinda feel helpless actually, with not knowing wat to do as most of the real world trouble starts to haunt me now. sometimes i wonder, am i really fit to be a doc....even if i'm more of an unwilling one?
hmm...