I'm on both these med's (along with others)

Neurontin is to help your pain, but you must increase slowly to avoid the side effects. 300 mg a day for three days then 600 mg for three and so on, did your dr say this to you? Find the dosage that helps you within the max dose!
For me the sideeffect was to much at the highest dose(3600), 1800 to 2400 is max, for me, we are all different. According my Dr ; 900 a day is the lowest for effect on pain. Give it several weeks before you deside if it helps or not.

Amitryptelin is for pain and sleep at night, makes you sleepy so take this an hour before sleep. I take only 10-20 mg of these, to avoid a hangover the next day.