Sometimes I have headaches and sleeplessness. Am I getting anxiety disorder?

See your PCP. Headaches and sleeplessness are such broad medical symptoms that before and anxiety disorder could be diagnosed, it would be necessary for you to make sure that there is nothing medically going on that could be causing these symptoms.
It Depends. Before defaulting to anxiety as the reason for your symptoms, your doctor would want to rule out other serious causes. Headaches are very non specific and require a thorough evaluation that can include a headache diary, imaging studies and possible medications. Insomnia or sleeplessness is also a multi-factorial problem that warrants an evaluation.

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I am suffering from confusion, sleeplessness, taking right decision at right time, lack of self confidence, anxiety disorder, anorexia nervosa.

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