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 counselings the symptoms will improve. If you are feeling suicidal or hopeless consult a Psychiatrist immediately

Hi. I am sorry to hear that you are going through such a tough phase. Please know that help is always around the corner. The feelings you are describing definitely need a look into and an actual diagnosis can be only made if you speak with a mental health specialist. But it does sound on the lines of depression. I urge you to start small, by talking to a close friend or family friend and finding support. Also try to continue doing your day to day routine activities no matter what. All the best. Remember - this too shall pass!