Is there such a thing as a testosterone overdose for a female?

Same as in men. Too much testosterone in women can lead to similar side effects as in men: change in mood for worse ('roid rage), oily skin +/- acne, hair loss, increase in blood pressure, drop in HDL (good) cholesterol & too much blood (polycythemia). These last 3 side effects can increase risk for heart attack & stroke. Therefore, labs need to be monitored closely in both sexes when supplementing.