Talk to Psychiatry on Antidepressants Are Safe In Pregnancy?

I am 13 weeks pregnant. I been taking sertiline or zoloft for 4 years before my this pregnancy. I left sertiline last year. but now, in this pregnancy I am struggling with depression. I can't control my worries because of my some household issues. One of my child is already autistic. and in that pregnancy , i been through depression but didn't take any antidepressants. Now my Dr said to me if I want, i can start sertiline, but i have a fear of side effects on my unborn child because the other child is autistic. I don't know what to do? please help me with honest advice about using antidepressants during pregnancy?