Am I mentally ill? I know that the only way to be sure is to check with a doctor in person, but i m a bit nervous. I ve read online feeling sad, excessive worry or fear, insomnia , change in eating habits, withdrawal from socializing with friends, unable to deal with daily life, display of anger, violence or hostility, thoughts of suicide , anxiety of all types, mood swings, depression, delusions, paranoia , split personality, sudden and uncontrolled body movement, ADD, and ADHD are signs of mental illness, and I have and had all of those. Can someone help?