So you make an appointment a couple weeks ahead of time but the rate changes between when the appt is set and when it will occur.
WTF?

I would ask her because you made arrangements before the rate change can she honor that rate or do you have to pay the new rated that is on her site (unless the rate went down?) Communication is key and she may honor her old rate for you. If it were me I would. I actually changed my rates but, my rates went down for TER members with at least 1 review but, thats me.  

IMO, it would be unprofessional for the rate change to apply to you, since you booked at the previous rate.  I've had this happen with clients, and I always honor the rate that was listed when they reserved their appt.  If she doesn't let you know soon, just ask her.  Better that than to assume...

She replied to me and cleared it up.  Very classy lady

.....that was posted when we scheduled; not the new gift.