Thanks for query,
It seems that you are having generalized weakness and under nourishment.
Consult physician to rule out any under lying pathology.
Go for Xray chest,blood,urine check up.
If every thing is normal then go go for,
High nourishing diet,milk,eggs,pulses,
Good fat and carbohydrate
More green veges and fruits,
Do not worry about your habit,it was natural.
Ok and bye.