hi, try concentrating on a candle flame for as long as possible and slowly increase the time. do visit a psychologist (they are not doctors) and seek therapy. it'll be helpful. take care.

Dear sir, Such a situation is very distressing, I can understand. But there are many situations where one can have these difficulties. Hence, a comprehensive assessment and diagnosis will be the key to getting you out of this trouble.

Hi,  may I  know what do you do now?!! Are u studying or working? !! What has recently happened which is affecting your conscious present life itself. Do think about it and find the root cause of your current  situation. If u find it difficult do consult a Psychologist and get a clarity about your problems and also solutions to resolve it.

Our thoughts, feelings and behavior are influenced by many factors like past experiences, upbringing, genes, environmental issues, stress levels, physical health etc. Yes, sometimes they become dysfunctional with negative automatic thoughts, anxiety, depressed feelings etc. You got to first get present to these experiences in the context of above and then, take things as a matter of fact. Read about mindfulness and practice. Make some lifestyle changes like joining Yoga, relaxation / meditation, eat healthy, practice good sleep hygiene etc. Address any underlying stresses one by one. If it's becoming severe it impacting a lot, you may need specialist treatment like cognitive behavior therapy and may be medicine too. Please consult a psychiatrist. Best wishes