Were you not tapered off the Pristiq
at all? How long were you taking the Pristiq
If you were on it for a month or more, and were not gradually tapered, you most definitely could be experiencing a discontinuation syndrome (like a wd/). The Viibryd would help a little, but the two are not interchangeable, therefore, you may notice some side effects during the adjustment phase. Definitely let your doctor know what's going on.