Why does my client have such trouble sleeping and often wakes up with horrible anxiety, does not feel grounded, and not like herself? What is the best way to help her?

Unfortunately, she has acquired some spirit attachments that are causing great inner torment for her within the deep subconscious level of her mind. This can be dealt with using the Lightworker Healing Protocol, as you plan to do for her. That will help greatly with her peace of mind, her equanimity, and her efficiency in doing all she needs to do with her life.