I'm sorry you are feeling so bad. As for another drug, I might suggest Tramadol, as it helps me and I don't feel any side effects that I am aware of except possibly difficult urination. I am taking gabapentin 2000 mg/day and Tramadol 200 mg/day. Also alpha-lipoic acid & evening primrose oil help me.

I imagine you are feeling a lot of stress over this. You might try some simple breathing exercises or meditation. I know this won't make your pain go away, but it may help. Try to keep moving and doing something. Don't ruminate on your pain.
Good luck,
Ron