Whats wrong with me? anxiety?

ive been very tired the past couple of weeks..ive been slacking on the sleep..i am not very active iether i usually lye around. anyway when ive been driving lately it feels like im even more tired and it seems like i gte really nervous...could it be from being really tired?? im fine whne im round peopl en tlaking but when im driving its bad...my legs get shaky...esp at stop lights.i always feel like im gonna get stuck there..what is causing this?? lack of slle, impatience, or panic attacks? what can help me get throught this?? excercise?