I think u should visit a counselling psychologist.It is necessary to diagnose your problems.
You are only 15,a long life ahead.U must live a healthy life both mentaly and physically.
Health Tips
1.avoid tok much social media
2.avoid too much using pc or mobile
3 sleep 8hrs at night
4.share your thoughts with your parents and your family physician.
5.morning walk or work out regularly.
6