Hello Friend, Good that you are seeking a help here. Such mood swing or emotional imbalance can be due stress or tension. Such things are quite normal in today's professional world and you need to be prepared to handle it as no one can escape for it. There are few stress management techniques you can follow to overcome this. You can reach me online or directly to assess your current suitation and explore suitable stress management solutions that you can practically follow.

Feeling low, having crying spells, sleep and appetite disturbances, and difficulty in concentration and attention are some of the signs of Depression. Consult a Psychiatrist for a detailed assessment. It is likely with medication and counseling the symptoms will improve. If you are feeling suicidal or hopeless consult a Psychiatrist immediately.