I think most of this is something that comes from communication and working out trust.

Establish limits, establish what is safe, and at first make no attempt to push those boundaries.

I think many of the submissives here will agree, that where things like anxiety attacks can occur, it's important to develop trust. Reward success, and never lie. Create an atmosphere where she is comfortable with communicating her needs and discussing fears openly. Most of all, if you get in over your heads and she begins to change, consider therapy. Decide at the beginning whether you will take responsibility for her if the burden of her desire to please you and her fear of bondage should prove too much for her. If that is too much of a burden, then perhaps you must sacrifice your D/s needs to keep her healthy, or find someone else.

The burden of all of this is not solely on you. She must also work to satisfy you, within the limits of what her fears will allow. If she is somehow unconcerned with making you happy, then you should reconsider the relationship. In cases like her's, so much must ride on her limits... but there must also be an effort on her part to fulfill you, or there is no true D/s.

My recommendation? (And you probably won't like this part...) Keep the relationship nonsexual at first, removing all BDSM elements from sexual contact, and sublimating sexual activity to begin with, but not completely abstaining from it. Set aside time to explore simple D/s issues together, take time so she can find joy in being commanded by you, getting approval from you for a job well done. The forum has excellent resources for this kind of thing, exercises you can do together to establish the nature of the relationship and explore what it will mean for her to surrender herself to you.

Some of the submissives on this forum have had abusive pasts, and are willing to talk about ideas to make the introduction period go smooth and safe. Jaeangel in particular would be a tremendous resource, if I were in your position.

Good luck!