Adderall while pregnant?

Liz
Has anyone taken adderall while pregnant? I just found out that I am pregnant with my first, and I had been taking adderall up until 4 weeks. I am nervous that it could have negative effects, but I can't find any research on it. I also am nervous that I am going to be able to focus and function without it for the rest of my pregnancy without being depressed and stressed out. Would love to hear everyone's thoughts.