I'm prescribed 100mg zoloft (sertraline) in morning & 100mg trazodone at night. (for past month) still issues with depression, anxiety, insomnia. what to do next?

Talk therapy: Do you have a psychologist or a therapist? Talk therapy together with medications works better than medications alone.

Your medication needs to be managed by a Psychiatrist. If you are not confident in your Dr. please see another for a second opinion. Medication alone may not be enough to help. Please see a Clinical Psychologist with expertise in multiple types of psychotherapy. A physical exam could determine if your symptoms are due to a physical illness. You may benefit from a sleep study.