Hi Low mood Low energy/ lethargic Loss of interest Are most likely to be part of Depression.. We need to know more details before diagnosing you n help accordingly...like how long you feel this way...other associated symtoms ( concentration levels/ decision making/ irritability/ Increased crying spells/ sensitiveness/ worthlessness/ suicidal thoughts etc) Hz sleep n other biological functions? What do you mean by fears?.. understanding in detail about those fears ... which you feel as cause of your low mood is important.

Need to be evaluated

You seem to be suffering from depression please consult a psychiatrist. Your symptoms are very likely to be of a depressive illness but it could also be due to other physical illnesses so get yourself first screened for it by a physician too.