Essentially, you are on two drugs at once now, and could be suffering withdrawal from the Zoloft, side effects from the
Cymbalta, or a
combination both. If you had tapered off the
Zoloft as slowly as you needed to
and not started the new drug until having successfully completed that, you'd know if this was a withdrawal symptom and perhaps you needed to slow down the taper off of Zoloft. By being on both drugs, you have no idea what's causing what, and neither does anyone else.