Welcome to practo. When one gets overwhelmed by stress, when the stress goes beyond the coping capacity of individual then a clinical state of depression occurs. You are probably having a depressive episode. The positive thing is that with suitable medications it can be cured. However, because the treatment would demand detailed work up regarding your complaints and history, you will need to visit a Psychiatrist in person. Hope you find this helpful. For more info post me on my link. Regards Dr Pankaj Borade