I was told that if you take Paxil that you shouldn't just stop taking it, it has to be done gradually. The fact that you ran out and weren't taking it for 2 weeks might be why your panic has gotten bad again.
I know you don't want to see the Free Doctor in the city, but if its your only option right now you might want to re-consider. The longer you go without treatment, the worst it may be for you.