I recently moved back to PA from the Carolinas. While in the Carolinas I needed almost no allergy meds. Now that I am back in PA, in December, I am back on my Allegra. I assume I am reacting to mold, but who knows.
Comments appreciated, thanks.

I would assume the other way around since the south is more humid and has more mold issues. It could be you've developed an allergy to something you left behind in PA since you've been gone a while. That's a very common occurance. As long as the Allegra works, I wouldn't worry about it.

I live in PA as well. I am on Allegra not because of mold, but because the dampness associated with mold attracts dust and the dust (mites!) is (are) the thing(s) to which I am highly allergic. Don't know if this helps or not... you could go to an allergist and get tested if you'd like to pinpoint your exact allergies. Welcome back to PA :)

I recently moved back to PA from the Carolinas. While in the Carolinas I needed almost no allergy meds. Now that I am back in PA, in December, I am back on my Allegra. I assume I am reacting to mold, but who knows.
Comments appreciated, thanks.