Can stress do this?

I've been shaking constantly for three days, especially bad at night and in bed. Its concentrated around my hamstrings and sometimes in my back. I've been on a trip with my job for two weeks now. Wake up at 8 am and go to bed around 11pm. I'm away from home, and I'm working on opening businesses and training new people. At the same time I'm having family and relationship problems, as well as planning an event from my store. I've had a few stomach aches too, lack of appitite, anxiety, and im really tired. Could you help me figure out what this is? I have a history of allergies and anxiety problems as well.

Thanks

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