Zoloft & Breastfeeding

I’m a second time mom, two boys under two. My youngest is almost 4 months old and I have been having pretty extreme post partum depression. My doctor recommended Zoloft. I’m honestly pretty terrified to take it while breastfeeding but I don’t want to give up breastfeeding after working so hard to have a good milk supply this time. Has anyone taken Zoloft while breastfeeding? Did you little one have any issues, particularly long term?