Girlfriend has bad anxiety?

We’ve been dating for 5 months and everything has been going well. She has always been very good to me and she is my first ever girlfriend. She’s done stuff in the past and been hurt by relationships in the past that have really damaged her emotional state. She had a difficult time opening up to me because she felt vulnerable and afraid that I would leave. I continue to reassure her and promise her that I am not going anywhere, but she really doesn’t believe me. She gets anxiety over large things mostly but also can have a panic attack over the smallest things. I love her and really am committed to her, but I don’t know the best way to help her. We have looked into therapy and that’s probably the next step but is there anything else we can do?