Hello Friend, Good that you are seeking a help here. Sleep is very essential for both physical and mental well-being. While there are many reasons for sleep disorders, but most common ones are anxiety, lifestyle disorders and dietary. Better to analyze your daily routine and lifestyle patterns to identify the triggers for such disturbances. May be take a professional help to guide you assess yourself and identify solutions to overcome this problem. Feel free to reach out to me online for further evaluation and recommendation that you can follow practically to overcome this problem. Be positive. You will be alright soon.

Hello Sleep is an important biological need which helps us function efficiently during day time.disturbance in sleep quality and number of hours can affect our well being.kindly follow sleep hygiene techniques to avail better sleep

First do think much about exam or studies at night go to sleep early and get up in morning and go for studies do some relaxation exercise before going to sleep .if u still having difficulty consult psychiatrist near by you