Question about postpartum depression

I had my son on 2-28-22 and about 3-4 weeks ago I’ve started getting these voices in my head that my dad is dead and I need to check on him!! 😭😭😭 I talked to my counselor about it and she said it could be postpartum depression. She told me to call my obgyn about it but I don’t think a obgyn will see you for postpartum depression.