numbness
and tingling of the face, including the mouth, hands,
and feet, headache, dizziness, drowsiness, and attention problems.
So, the symptoms you are experiencing may be side effects from the amount of Cymbalta you are still taking.
I would recommend you talk with your prescribing physician and possibly a pharmacist as well about your symptoms and see if you might be able to cut back even more on the Cymbalta.