I had a reaction to Lyrica as well. I can tolerate Neurontin (I'm at 400mg 2 - 3 times a day) but it is not going to really stop a flare, just dull your nerve pain. You have to ramp up Neurontin from 100mg until you get to a tolerable and effective dose. Not a short term solution to a flare.

The most effective short term solution to a flare for me has been Toradol (a powerful NSAID). A steroid taper (Medrol Dosepak) can also be effective. A strong muscle relaxer also helps (Valium, Zanaflex, and Flexeril are examples). I found that exercising and physical therapy only aggravate my flares. My advice would be to rest and avoid raising you arms. I've learned to drive with my elbows at my sides holding the bottom of the steering wheel so I don't aggravate the TOS.

Hot showerers/baths as well as heating pads or Thermacare patches also help me.