How to treat a 12-year-old girl who is an introvert, very unmindful, and has lost confidence?

Hi doctor,

My daughter is 12 years old. She was very much jolly and extroverted till six years of age. When she was four years old, I was in a job requiring me to stay out of the station for almost half a month. At that time, she used to stay with my parents-in-law, whose marital relationship was not healthy. Moreover, my husband was also very busy with his career. My daughter's teacher (when she was in class 1 at the age of five, three months)used to neglect her a lot and always treated her as a backbencher. From then onwards, I felt that my daughter started to feel low, lost confidence, and did not perform well till class 2. I felt really bad for her and left my job, also. When she was in class 3, her class teacher changed, and that person brought a change in my daughter's life. I also started to help her in academics, and she began to perform well. I never pressured her to be at the top of her class. Though she was performing well, that lack of confidence is still there, and she is very unmindful and introverted. I had my second child when she was six and a half years old. Due to her unmindful nature, I sometimes lose my temper and scold her. Now she is in Class 8, and I am afraid if her unmindful nature keeps increasing, she might not be able to stay alone or perform at her desired level in the future. Please help me to help my daughter.

Hi doctor,

As far family environment is concerned, it has changed as both my parent's in-laws are no more, so no unlikely event. She is introverted and unmindful but can make friends very quickly. I scold her and try to behave as a friend to her, but her habit of forgetting small things is increasing daily. Moreover, she keeps on arguing in favor of her mistakes. Regarding extracurricular activities, she is interested in drawing and reading story books, for which we continuously encourage her. Due to her unmindful nature, she is losing various items, from cheaper items to costlier ones. She forgets to carry out daily life activities, like forgetting to flush the toilet after using it, etc.