You didn't say how long you were taking it or at what dosage you were at. This would be helpful information. If you were taking it for neuropathic pain and NOT social or generalized anxiety, I don't know why you would suddenly develope anxiety symptoms. You should not discontinue this medication quickly after long-term use, a taper over at least one week is recommended or withdrawal-precipitated seizures may occur.
I would suggest you speak with your doctor about this sudden onset of anxiety as I am not qualified to tell you if these symptoms are connected.
Keep us posted, OK?
Peace
Greenlydia