Hi there Worried2!
It is suggested to take the test to your physician to aid in diagnosis and to help him/her have a greater understanding of how you feel. You may or may not have panic disorder per se but if without P.D., one could still suffer from panic attacks, generalized anxiety, and/or social anxiety.
As for relapse, personally, I think I will ALWAYS have the "potential" for relapse. I am not suddenly going to be a calm, cool person. I will always be pre=disposed to being anxious. But..it is learning how to cope with anxiety, and learning how not to be afraid of it that will set you free. For me, it is a long, hard process...one I'd rather live without. I know I will always have the capacity to "relapse" but if I am no longer afraid of the symptoms, it won't stay. It'll wash over me and be gone.
Peace out,
Danielle