Opinions on gabapentine for pain control

Hello, 

I am looking for some advice on taking gabapentine for pain control. I have been prescribed this drug as I'm constantly in pain in my pelvis and legs since lymph node removal 18 months ago. I'm really wary of taking this drug as the long list of side affects is terrifying me.... I feel my GP didn't really explain this medication to me he just said try this. I am waiting on results of pelvic MRI and have put off taking this med until I know the results but should I just go with it? Really could do with some opinions if you have the time 

Thank you Vix