hi I can understand your emotional variation, but there might be some reason for your feelings, whether you might be feeling confused, anger, mood, guilt and other things. due to this there is a disturbance in concentration on any activity. Introspect yourself whether personal or professional life is causing you difficulty in various things. during this time you can take the help of experts either through direct visit or through online. I am sure they will help you to handle in a better way. I think you need work on your confidence level also. stay positive.