I am on lexapro, 10 mg a day for anxiety and I'm 11 weeks pregnant.
I've shared my story a few times on here. My PCP didn't want me to be on lexapro while pregnant, so he told me to wean off of it. I had horrible anxiety and numerous panic attacks daily. I developed depression and ended up admitting myself to the hospital because I was suicidal. I was 5 weeks pregnant at the time.
I saw a great psychiatrist in the hospital who told me that (obviously) the risks of me being off my medication were too great. In my case, the benefits of lexapro far outweighed any risks. He discussed the possible side effects with me (they were minimal) and we both decided that it was better for me to go back on lexapro during pregnancy.
I am seeing a new doctor now, as well as a psychiatrist and a counselor. I don't love that I have to take medication during pregnancy, but I know it's what's best for me and the baby at this point in my life.
As far as risks to the baby, I was told that the main risk is that the baby might develop a dependency to lexapro. If you've ever missed a dose of your medicine before you've probably experienced some of the withdrawal effects. He told me that doctors would monitor the baby after it was born, and that it might be a little fussy or sleepier than other babies. He said that if I was breastfeeding, the baby would get some of the drug through my milk and might not show any withdrawal symptoms whatsoever. He said there is no risk of birth defects or anything serious like that.
All that to say - you have to decide what is best for you. Of course there are risks. There are risks with almost any medicine you take. But there are also very serous risks when a mother experiences extreme stress/anxiety/depression during pregnancy.