i have taken lexapro and me and baby are fine. some women i know of are on meds like valium and other anti-anxiety meds that have been cleared by their doctors. i am now on ambien cr which id also a class c drug. it was prescribed for me by my ob at 35 weeks. in situations like yours doctors usually weigh the risk of benefits to the mother with potential harm to baby. many people do not know this but it is illeagal for ANY meds to be tested on pregnant women. the meds that are generally considered safe for pregnant women are still just assumed to be safe. none are guarenteed...oh, i was also on xanax when i first became pregnant.