I was taking sertraline because I was BFing and got pregnant again. I was advised to come off the ADs for the first trimester, and then put onto fluoxetine for the duration of the pregnancy because as others have said, it is the drug with the most known effects in pregnancy.
DS did need a bit of help after he was born, and suffered some withdrawal, but this amounted to him being quite cold and needing a bit of incubation, but only for a few hours, and then he was very closely monitored for a few days before we were allowed home. His blood sugar levels were quite low and he was a bit shaky, but nothing more serious than that, and they couldn't even say whether it was down to the drug or not.
Anyhoo, I was under the care of the perinatal MH team, and they had me prescribed some sertraline for the post natal period as this is better for BFing. I did have a bit of trouble convincing the paediatrician in the hospital that it was OK to BF and take ADs though, and had to basically tell her to call my psych to discuss it, even though he had written a letter that was in my notes!
I would suggest asking for a referal to a perinatal service and make sure that all departments are talking to each other, and that you have someone with you after the birth who can advocate for you. My lovely DH, who had been up all night, bless him , fell asleep and left me, exhausted, hormonal and coming off the post birth high, trying to fend off two paediatricians who were trying to force me to bottle feed to get his blood sugars up and because they thought it wasn't safe. thankfully I had a fabulous midwife who was fighting my corner for me.
In the meantime, there is some information from LACTmed on fluoxetine, paroxetine and sertraline. It's worth pointing your HCPs in the direction of this site.
Good Luck, and I hope you are feeling OK