What other drugs are available for nerve pain if gabapentin, lyrica (pregabalin) and cymbalta don't work ?

Few others: Amitriptyline, effexor XR, and pristiq (desvenlafaxine) can also be tried..

Think beyond drugs: Medications are one way of controlling nerve pain. Pain is a complex holistic process. You may be able to decrease need for meds by addressing other issues. That includes nutrient status, stress or emotional trauma that may have accompanied or pre-dated the injury, and movement and use of the limb. It's a complex topic. You might look for a doc who does integrative or functional medicine.