Any moms on anti-depressants?

Jessica • 29 years old, in love, and married. Mommy to Lucy born in March 2016. I am complete.
I'm on lexapro. Doc says im ok to take it while pregnant but may need to stop to breastfeed. I'm hesitant to do so because I feel like that's ppd waiting to happen? 
Anyone else going through this? What's your plan?