Continue your meds. With the exception of Paxil (paroxetine) the medication is usually continued. The risks of depression during pregnancy are felt to be greater than the medications. There are reports of an increased incidence of congenital anomalies with ssri's, but the risks of depression may be worse. Paroxetine carries a much more significant risk. Another ssri or antidepressant should be used if possible.
Bad things can . Happen even if you do everything right! talk to your doctor about your concerns.
SSRIs in pregnancy. Selective seritonin reuptake inhibitors (ssris - paxil, (paroxetine) zoloft, prozac, etc) have been implicated with newborn pulmonary hypertension & now any cardiac abnormalities. We've used these medications successfully in pregnancy without problems. Better to discuss with your ob, recommend continuing if needed & as always with the lowest effective dose. Your doc will probably recommend a fetal echo.