As with all suggestions, this is not to be used as a substitute for medical advice, but if you're looking for self help tips to help with anxiety, then this could be a good place to start.
Due to the nature of my business, I endeavor to be able to offer an appointment within 48 hours of initial contact. This means that I require notification of any appointment needing to be cancelled to be done with at least 24 hours notice. Failing to give 24 hours notice will be met with a request for payment in full, to cover the appointment .Any further appointments may need to be secured with pre-payment made via bacs transfer. I regret having to bring in this policy, but the number of late cancellations, and'or no shows recently, has meant that people are made to wait for an appointment longer than is necessary.