Thanks for choosing health care magic for posting your query.
From the description that you have given, it appears that you are having a depressive episode. You need to see a psychiatrist
who can start you on some drugs (anti depressants) which will make you feel better. You should also insist your psychiatrist to train you in CBT.
Exercise and good diet will also go along way in improving your health.
Hope I have answered your query. I will be more than happy to help you if you need any further clarifications.
In case if you want to discuss with me directly you can use the link:
Wish you a good health!