In my experience (I'm prescribed Gabapentin for anxiety) the withdrawal from abrupt discontinuation of Gabapentin is really shitty. Everybody's different, but, if you do experience uncomfortable withdrawals from Gabapentin you're going to want to seek out something that acts on the GABA receptors (benzos, alcohol, pregabalin, etc.). I'm not a doctor but I've been through exactly what you're describing and I made absolutely sure that I wouldn't ever run out early again. At one point I told my prescriber to take me off the Gabapentin because of the withdrawals.