I've had flu-like symptoms for 2 weeks. my voice is almost gone and throat is very sore. i am a high school teacher, so i have to talk most of the day (especially at this point in the term). when, if at all, should i see my gp about this?

Flu ? : Flu is usually there & gone within a week or so. Many other conditions can share some overlapping symptoms. To the degree any such symptoms interfere with your ability to function you should have them evaluated. This could be something simple & self healing over time or could be the first stage of a worrisome process. Go get seen.