fatigue is a result of anxiety/stress/depression.
If you can't get out of bed and all you want to do is sleep then you are probably depressed. If you are tired during the day, sometimes overwhelming, then it is likely to be nervous exhaustion from stress/worry/anxiety.
Try to look at your diet. Eat lots of fruit as oppossed to sugary drinks, chocolate, coffee etc. Fruit, nuts etc will maintain your energy whereas sugar will pick you up and drop you down quick.
Eye twitching is a nervous symptom from a lack of sleep or stress.