To add on what Amy's already said... they will probably make you give a unrine sample at every appointment starting at your first visit, and also have you answer a list of questions about you and your family's medical history as well as the father and his family's medical history.
I was told its safe to take Tylenol during pregnancy for headaches, but every doctor is different so I would make sure you talk to yours about what he thinks is safe.
Good luck
