[stronglikedan]

IME, it's best to start with the psychologist. They can determine whether talk therapy will be enough to correct the chemical imbalance without drugs. If necessary, they can refer you to the psychiatrist, who can give you the medication, but doesn't want to talk.

[tachyonbeam]

They can also work in tandem. You might be more receptive to therapy and analyzing your feelings when you don't feel like the world is ending. IMO, there's a threshold where antidepressants are necessary. When I lose interest in everything I care about, I don't feel like cooking, everything seems boring, and I have no energy (anhedonia), that's my threshold.