I completely agree with vans1974. It is probably just the stress that is bringing back the voices. Anxiety will do it. And, of course, toleration to the meds. You might need them adjusted. I know, I know, not something you want to hear or look forward to doing with a job you have going for you right now, and getting used to psych meds takes time, been there, done that myself.
Like vans1974 said, check in with your psych dr and let him know whats up, maybe you need a med adjustment, a little tweak to make things better. Just something simple! I will be routing for you!!!