Worst panic attack I've had in a while

I have DPDR and I was improving on my journey of dealing with agoraphobia, however, yesterday I had a very bad anxiety attack when I was taking a walk with my mom, now I'm scared to go back to the mall even when I have felt safe there for a while.

Yesterday I also said I wouldn't let it bring me down and pushed myself to go out again and I felt better, even if just a bit. What worries me is that I have a class on Saturday, and I fear I might felt like this.

What scares me the most is feeling like this and not having a quick way to get home, anyone has advice for me?

(16F).