Something is disturbing you.You need to talk about your problems. It's a typical symptom of depression. Try to think what you want to do.Try to concentrate on your studies .Do something constructive .You can consult me online. Recurring thoughts when you try to sleep, getting irritated ,eating alot,theses are all symptoms of depression .You are escaping from what exactly you should do.Dont worry everything will be fine.
Next Steps
Dont be depressed. Keep smiling.Try to come out of it.If it's going beyond your own control you can consult a psychotherapist.
Health Tips
At the bedtime do some relaxation.Close your eyes n try to relax n think about something which gives you or makes you happy.Let me know if it helps you.Tc .