Neurontin (gabapentin is generic) is one of the faster acting in that class in that you don't need a loading period. Hopefully you'll notice something in a matter of days. I took it for several months and found it helped quite a bit with shooting pain and brought the stinging down even though I only took 300 mg at bedtime. I quit taking it because I am one of those few people who gets depressed on it. Since you have daytime duties you might want to try the bedtime routine a couple of days just to see how you do or have them give you the 100mg caps so you can start low during the day and add on later. It should help with anxiety and mood swings. Neurontin works by down-regulating nerve signals, so the signals are not as strong and the system is more calm. It doesn't work by blocking pain receptors.

I hope you find relief soon