I have had left leg pain since 2013. i took xrays, seen a chiropractor for 6 months and now on gabapretin 300mg. nothing is helping. its getting worse?

Maybe need more Gaba: Gabapentin is a good drug for nerve pain--but you are taking a pretty small dose. I recommend a high enough dose during the day to relieve your pain, but not get sleepy. At night, a higher dose can be used. Gabapentin is a great sleep-inducer. It enhances slow wave sleep. Usual dose is 600-800 mg at night--but often need to go much higher. You can take whatever dose is needed for sleep.