I understand how you feel. You are only 18 and probably are overwhelmed with different roles to play, tasks and duties to perform.....there is nothing really wrong with you. Owing to so many roles and tasks you happen to feel lost and confused hence loss of confidence and conflicting emotions To rule out any kind of medical challenge....visit a therapist AFFIRMATION As a first step begin with Telling yourself "you are capable and can handle any task with ease" CHUNKING Since you are getting overwhelmed, begin chunking the task you need to do. Compartmentalize your mind into each task at a given time FOCUS once you have broken your task, now focus only on the given task and focus on the positive traits which you possess to complete your task. Once the task is completed, give a tap on your back.....for having done a good job ( acknowledgements and appreciation is needed) Then move on to the next task