from your description of symptoms, you seem to be suffering from mood disorder which can be of many types, it can be depression, schizophrenia
or bipolar disorder
you could be suffering from depression, or you could be having withdrawal symptoms
from smoking so much and you are trying to reduce.
i would suggest you need to be seen by a psychiatrist
for check up couselling and to be put on medications to reduce your symptoms
hope to have answered your query
get well soon and have positive thoughts and be strong.