Hello Ryan,
I am new to this board but not new to Panic Disorder. In the past I have taken a number of SSRIs, Paxil being one of them. Like you I weaned off it and, also like you, after feeling fine initially, my symptoms returned about 9 months later.
Having had several relapses over the years, I have now determined, in agreement with my doctors, that my disorder is chronic and I will probably need to be on medication of some kind for the duration.
In your case, it could be that you might need to up the Paxil to the previous effective dose. It's also possible that Paxil has 'pooped out' on you and so a switch to another AD might be in order. Or you may only need a supplement benzodiazepine type medication to use PRN to get you over the rough patches. Of course, you would need to discuss this with your doctor. It is unfortunate you have to wait so long for an appointment.
I also agree with other posters that taking medication is only part of the recovery process. There are many other tools we need to use to make an optimum recovery. If you haven't done so, following some CBT instruction might be the missing piece of the puzzle for you. I know I need help with that part myself which is why I signed up for this program.
Best of luck,
Shrug