Loss of interest, decreased concentration and attention, feeling low and disturbed sleep or appetite are some of the signs of depression. Consult a psychiatrist who will assess you in detail. If you are feeling suicidal or hopeless, seek professional help immediately.

I understand your situation. You seem to be suffering from depressive symptoms including being irritable and more sensitive. However more information regarding your sleep, hunger, energy levels and concentration at whatever you do would be helpful to decide the severity of your condition. It is easily manageable with appropriate treatment. Some counselling sessions and if needed medical help might be useful for you. I would also be more than happy to help you with that if you are looking for online assistance. Discussions will be held confidential. You can directly consult with me through Practo as needed. Online chat consultation is also available.