U might be experiencing initial symptoms of a new onset psychiatric problem.. Keep urself relaxed and practice yoga or meditation..  Feel free to consult me online for assessment and medical opinion

Hello Friend, Good that you are seeking a help here. Distrubed sleep, loss of appetite, loneliness, irritation, palpitations and nervousness are clear sign of anxiety. You may be emotionally disturbed due to some stress related to career or exam or relationship or family. Not sleeping for so many days is a quite serious issue and can affect your health. Take an immediate help. Take a professional psychology counselling support to first figure out the reason for your anxiety and find the solution to control it.