Hello Reader, Loosing a job always affects us. If we live present job for some other job with better perspective then also we feel bad due to our attachment with colleagues and work routine. You may be little anxious about your future and days to come and sometimes this lead to indecisiveness and heaviness in head. I think that as you have resigned you might have thought before hand and other job might be waiting for u , till then Start regular exercise, cultivate a hobby, meet friends, keep yourself engaged this will help you. If the problem persists meet a professional.

It looks like you are going through depression.it is better to consult a psychiatrist to understand the severity and help that you can get. If you want to come and see me kindly book an appointment and visit me