paxil is one of many prozac type meds and sometimes does stop or reduce panic attacks and social anxiety, it can stop working however, the usual dose range is 20 to 50 and sometimes upping the dose gets it working again
any valium type med will also help a lot, they all go well with the paxil, take any you can get, start with a low dose as there can be strong sedation until you get used to it, klonapin lasts longer than xanax, Xanax XR, IMO isnt worth the extra money
Its also good to learn CBT panic attack and anxiety coping skills
one thing that always helps if feeling panicky is to relax and breathe deep and slow, dont tense up or fight back