How long were you on antidepressants for pp?

Arianna

I was diagnosed with postpartum depression after having my baby 5 weeks ago. I was put on Zoloft and I feel as if it is working. I'm more confident and uplifted. It's been about a month on Zoloft. How long did your doctor keep you on them? How do they know when to take you off? I see my doctor next week.