It worked well for me for generalized anxiety/panic disorder and somewhat for OCD for about a year, with very few side effects. Then I started falling into a major depressive episode, and my new p-doc switched me to something else rather than upping the Paxil. Are you staying on the Wellbutrin, too? I was only on Paxil (though I'm now on Wellbutrin and Zoloft), so it might have worked with Wellbutrin for me. Good luck!

Another option, if that doesn't work for you, is to try an SNRI, like Cymbalta or Effexor (can also take with Wellbutrin).