Katie, call and CANCEL the appointment.
You are unsure and need to do a LOT more research. This is not something to mess around with! If you go in, with your current feelings, they will railroad you into doing all the vaccinations THEY want her to have. You won't know what hit you and you will leave that appointment with a completely vaccinated baby and wondering what happened.
You CAN stop vaccinations anytime you want. The series can be started again, later, should your research convince you that they are what is right for your child. But, once they go in, they don't come out!
Cancel the appointment, tell them something has come up and you will call another time to re-schedule. Do NOT let THEM set another appointment.
Remember, you hired your doctor, not the other way around! They can be sweet and supportive. However, those offices are rare.
By the way, there is NO reason, other than CONVENIENCE to do multiple shots at one office visit. If your child should have a reaction, there is no way to know which vaccine did it. I know, because we almost lost our son at age 7 months to one of the six vaccines he got at that visit (HepB, Hib, OPV, DTP). It happened within 30 seconds of the administration of the vaccines, while still on the exam table.
Please, please, PLEASE wait until you are completely, 100% sure. And, if you do decide to continue, PLEASE, just one at a time!