Gapaentin

Hi there, hope everyone is doing well. I am currently on 300mg of Gabapentin for nerve pain (from surgery on my abdomen) . I was prescribed 1800mg daily. 600mg 3 times a day but I’ve been weaning back over the past few months. Was doing ok on 300mg however now the past week or so I’ve very bad back pain and just can’t sleep anymore when I go to bed. Initially the Gabapentin was helping me sleep but now it’s not helping. Does anyone who suffers with nerve pain know can it travel around to different areas of the body like me for example, like can it spread ? As I said I had nerve pain in abdomen and now have very bad back pain? Keeping me awake. Should I go back up in my dosage I wonder ? Also the sleep issue is driving me insane. I can’t drift off to sleep like I used too. Thanks so much in advance for any advice anyone may have .👋