It would be very difficult to tell for sure whether there is an underlying problem for your symptoms without a thorough examination. However stress
is a very important cause for fatigue
. Other causes include inadequate sleep ( try to catch some good sleep at night for 7-8 hours), poor nutrition ( a balanced diet should take care of any possible deficiencies), thyroid disorder
( a blood work up would help such as thyroid profile). It is better to consult a physician for the above so that a thorough examination along with investigations is carried out. For burning sensation in the eyes you can try using over the counter lubricating eye drops, 1 drop 4 times a day for 3-4 weeks.