Feeling of anxiety. Very quickly.

Well the symptoms you have described suggest more towards a depressive disorder. Avoiding friends, staying alone,negative thoughts, thoughts of you hurting oneself, are all part of depression. Getting restless, acidity and being afraid are part of the comorbid anxiety symptoms  you have.

kindly consult a psychiatrist. Check your thyroid and Haemoglobin levels.

maintain proper sleep schedule. Always be with family and friends. Yoga and relaxation exercises and meditation helps. Try to attend social gathering and go to parks to change your routine schedule. Try to involve yourself in any sports or games you love to play . play with children they are the best natural medicine. All the best.  Be relaxed stay healthy.

Based on the information that you have provided, you could be having some symptoms of a psychiatric disorder. Certain disorders like panic disorders can have symptoms of repeated attacks of panic and feeling an impending doom like sensation along with physical manifestations of anxiety. Generalized anxiety disorder can also have symptoms such as a free floating anxiety regarding all aspects of life such as health, finances, future, etc. When a person is depressed, he or she can experience negative thoughts, crying spells, mood changes, feeling on unhappiness and feeling of hopelessness and helplessness. Certain individuals can have simultaneously both features of anxiety and depression such as Mixed Anxiety Depressive disorder. Stress can affect mental health tremendously. Depression, Anxiety and Stress related disorders can have a neuro-chemical transmitter related imbalance as well in addition to psychological factors associated with its probable causation. As you mention that you have made certain changes to cope with the situation in your own way but you also mention that you are still experiencing symptoms despite making your individual efforts. A combination approach of medications plus psychotherapy focusing on your clinical condition after a detailed clinical evaluation can be helpful in holistic management of your symptoms.

Kindly consult a psychiatrist locally in your city who can clinically evaluate you, psycho-educate you regarding your clinical condition, counsel you, suggest some psychotherapy strategies such as Cognitive behavior therapy for anxiety and depressive symptoms and suggest you certain medications based on your clinical condition , severity and expertize.

Kindly focus on the positives of your life. Stay socially connected. Practice relaxation training on regular basis. Do not isolate yourself. Try to avoid excessive negative thinking in your mind. Make an activity schedule for yourself and and try to keep yourself occupied with activities. Try to go to the gym or walks regularly. Spend quality time with friends and family. Stay focussed on your present. Practice yoga and read some self help positive books. Stay fit , eat well, sleep well.

your description points towards anxiety disorder along with depression, it occurs due to disturbance of chemical balance in our psychological or emotional system, as you written about unknown fear, exagerrated episodes of sadness. these all changes occurs due to hereditary effect, your behaviour to negative circumstances or due to both effect. in short it is very necessary to understand the problem i.e. why it happened to you? to get rid of this. http://srhomoeopathy.com/diseases/psychiatric-disease/

firstly go for the investigation as told by dr kavita. yoga, meditation, balanced diet and homoeopathic medicine are the best healers for your problem.