When I'm paranoid I try to do stuff that's tried and true for me, things that I can link to reality. Distracting myself online, for instance. I can't always read books or watch movies; they trigger me if I'm already paranoid. Going out into public is a no-go as well. And sitting around doing nothing...forget it. Another thing I do sometimes is call and talk to someone I trust because I know that if I can hear their voice then sometimes it makes it feel a little more bearable.
Is there anything you can take aside from percocet? Anything in another class that won't trigger you?