Yes, it is actually a very good idea that you tell her how anxious you feel. I imagine that she may already be aware of how you feel, but just letting her know will put it in the front of her mind and she will be able to talk to you knowing how you feel.
It is important that you try to bring this attack up at the very beginning, like we talked about. Tell her about how anxious you feel then read her what you wrote about how you feel and about the attack. Then let her help guide you through the rest. That is her job, to be there for you and help you find your way to feeling better. Be sure that she gives you some ideas on how to manage your feelings through the weekend so you have something to work with in case you feel any worse.
You can get through this. Keep in mind that she is there to help you and is on your side. I am too. We both care about how you feel.