Your symptoms suggest that you could be suffering from a depressive illness. Did you have similar feelings and thoughts before? Are you having any thoughts of dying?. Inform your family members, talk to them, try any natural methods like meditation and Yoga. If these have not helped you, then visit a GP. He may evaluate you for thyroid, anemia etc which are treatable contributors to depressive illness. Otherwise visit a psychiatrist who may address your issues with counseling and or medications.