Isn't it funny how anniversaries of things can bring back the old feelings. I had a hard time for a bit when last may rolled around because it was the anniversary of when my panic attacks started. If I were you, I would ride it out for a week or so, but if you don't start to feel any better, go back into your doctor. Perhaps it is time to adjust or change your medication. For some people our bodies learn how to metabolize it and it becomes less effective. If panic attacks are a common symptom for you, you might ask about Zoloft or Lexapro. They are both commonly used for panic and anxiety, and both worked wonderfully for me.
I had a relapse last year that lasted from about Thanksgiving till right after Christmas. According to my Psychiatrist, that is pretty common. However, I really feel like I got screwed out of the enjoyment of the holidays and my faith wasn't terribly strong then. I know you are a fellow Catholic and this is such a beautiful time in the Church that I would hate to see you miss out on the joy.
I'll keep you in my prayers everyday. If you aren't asking for help in your own prayers, start now. Sometimes just turning things over to God and admitting that we are beyond what we can do on our own helps. If you need anything, or just want to chat or vent, PM me. You know I'm always here for you.
BTW, has it really been a year?