You name a drug and they've probably tried it. Too long a list to give you but it includes morphine, methadone and even botox. Quite simply there is no known drug or combination of drugs which works on more than 50% suffers and then only gives temporary relief. All you can do is inform your doctor and ask if he can suggest anything else to try.
We all have stages where we do cry, it can relieve the pressure and help you so let it flow when you feel the need.
One thing I have found helps is to leave my hand soaking in lukewarm water.

Gabapentin, naproxen sodium and amitriptyline are the cornerstone meds for me.

Gabapentin for the neuropathic pain, naproxen sodium for inflammation and general pain, and amitriptyline is an old school anti-depressant that also seems to help some off label for CRPS pain.

I have never seen a condition where the meds necessary to control pain are so very unique to the individual. Lots of "trial and error" is often necessary and encouraged.