Antidepressants and pregnancy

This is a topic that has been on my mind for some time now. I was diagnosed with bipolar when I was a teen, I am 31 now and finally on the correct medication. It makes me feel like a normal person. I take zoloft in the morning and then trazodone at night to help me sleep. I am TTC #1 and I'm concerned that my medicine could hurt the baby, but I feel that staying medicated during pregnancy is best for me. What are your thoughts on this? Has anyone has a successful pregnancy while taking antidepressants?