<human>: Provide a brief overview of the text.

For the past two weeks I've been working full time in an aluminium factory. I'm in the manufacturing area, and the jobs is quite physically demanding - lots of lifting, lots of repetitive twisting motions and no chance to sit down whatsoever.
I'm a petite woman, and while I'm certainly physically fit, I'm starting to fear that my body just isn't built sturdily enough for this job. My knees and elbows are killing me (I have a limp because stretching my left knee is too painful), my feet hurt so much they keep me up at night, and I've had headaches so terrible I've vomited 4 days already. I really need this job, and can't find anything else. I don't mind working hard, and I really want to push through the pain and keep working. My bosses have praised me a lot and keep giving me extra work opportunities there, and I don't want to let them down, but I'm starting to get scared that I'll permanently injure my my joints, especially. Does anyone here have any experience with factory work? How much pain is natural when you're just starting, and how much pain is too much?
<bot>: Just starting working at a factory, but the pain I get from working there is pretty much unbearable. At what point should I consider quitting?