Yes, just talk to your doctor. Things like that are tricky because they aren't tested or studied on pregnant women.
Talk to your doctor. If it has a warning label, obviously discontinue it! The thing with herbs and other natural remedies . . . they interact with our system just like drugs do. Being natural or herbal doesn't mean they have no dangers. So, I wouldn't take anything unless my doctor okayed it, herbal or otherwise. And then if you have been using it since pregnant, just let your doctor know. good luck!