Hello Friend, Good that you are seeking a help here. All these symptoms are pointing towards anxiety and depression. As you have identified such emotional problem are affecting your day-to-day normal life, then don't hesitate to take a professional help. When your mind is overruled by such  unwanted or negative thoughts, it's better not to be conclusive and think about any hasty decisions. Simply ventilate your feelings, emotions and concerns to a psychology expert. I am sure with a open discussions, you will be able to identify the root cause as well as a suitable solution to overcome this problem. Consult me online for further evaluation and recommendation.

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.

First of all stop the feeling of killing self. Your wish for life should always dominate your wish to die. Second het yourself evaluate fpr depression\ anxiety and so on. Then start your treatment with psychologist. Definitely things will change and u will alsp start feelinh good.

Hi What kind of unwanted thoughts are you talking about. This headache can be well due to tension and stress Try to analyze the thoughts and if they are illogical try to modify the way u look at them. Consult a mental health professional and talk to them Consult me or any psychologist for same All the best