I'm having nausea, fatigue and blurred vision. is it due to lack of sleep? i have a case of low blood pressure as well. could it be due to that? i also have a history of panic attacks.

Blurred vision: needs to be evaluated by an eye doctor. Low blood pressure MAY account for your other symptoms but see your doctor for a proper diagnosis and treatment. Panic attacks are best dealt with through a mental health professional. Peace and good health. "Hope and Help for your Nerves" is a good book about anxiety written by Claire Weekes.