I would (with my knowledge of psych drugs that is not to be compared to that of a psychiatric professional) say that 2) would be most likely. Are there other ways you could have handled the trigger you had? Or another medicine you could have tried in addition to the paroxetine to help handle that situation, whatever it was? I think you may be experiencing withdrawal symptoms from the paroxetine. And in my experience, it's been the case that reinstating the dose I was on ends the withdrawal symptoms. So perhaps you just need to reinstate the 40 mg paroxetine and potentially lower the Zoloft. Or maybe you need to augment the paroxetine with some other type of medication, like an atypical antipsychotic like Abilify. Hopefully this is helpful and I hope you feel better soon.