Anti-depressants during pregnancy?

Lauren
Hi all, i was prescribed sertraline (also known as Zoloft) but I chose not to take it because I found out I was pregnant.
I've recently been advised to take them again. Currently at 17w5d pregnant, no known complications.
Just wondering if any mummas on here have had any experience with anti depressants during pregnancy, good or bad. I just want to be sure no harm or risk will come to the baby if I do take the tablets.
Thanks x