I have misplaced my Gabapentin (pain medicine) -- what now?

I had a 90-day supply bottle for which I was probably about halfway through. It is not unusual for me to misplace things, but this is serious. I take the maximum allowable dosage and am about to experience the full effect of being without medicine.

I am suffering severe neuropathy from a severe gunshot wound (I am a victim of an “Especially Aggravated Robbery”) in 2011 and this is aggravated by being a diabetic. I do not have a “regular” doctor.

I have a portion of a small bottle from a previous doctor / pharmacy / insurance—but I doubt it will last more than a couple of days—if even that long. What do I do now?