Generally overwhelmed with sadness and lacking a vision about the future. but not suicidal, no thoughts about causing harm to myself. ?

Sound very low.: Your Dr can assess for mood disorder & causative underlying medical conditions. Talking therapy (Cognitive Behavioral Therapy or insight oriented psychotherapy) is allows for lasting change. Psychiatric meds may be indicated. Don't isolate. Spend time w people. Use your support system. Get out. Get at least 8 hrs of sleep/ night & eat healthfully. Daily aerobic physical activity is a big +.

I'm sorry: Hi. That's got to feel crummy. I'm glad you're not suicidal. Good social support, counseling, and antidepressants (all or some) may be very helpful. I hope this gets better you. Good luck.