Dealing with sudden anxiety attacks

so i started experiencing anxiety back in october and it seemed to just come out of nowhere. I wasn’t really going through any major life changes. I had experienced shortness of breath and other anxiety related symptoms in the past but nothing like this. It’s more like panic disorder where I just have a feeling of impending doom all the time. I’m on prozac now and feel much better but i’m wondering if my anxiety is related to an underlying health condition? especially since I have not had anxiety in the past and no one in my family with it. Has anyone experienced something similar to this?