Please talk to your doctor. They will help you with a safe plan for weaning you off, or they could leave you on them if it is absolutely necessary and watch you closely. Stopping cold turkey would be very bad for you and the baby, it can cause miscarriages. Doctors see this all the time so I am sure they can come up with a good plan to help you out. Good luck!
Talk to your doctor in order to do this. It's best to get their help and maybe you can slowly come off of them. It's dangerous to just quit cold turkey.