Hello and Happy Monday, ACIM!
If your brother in law is a surgeon, practicing in the area, possibly he's able to recommend a reputable GP through asking trusted colleagues in his network.
Hopefully you're able to discuss with your brother in law, how to gradually taper off of the Tylenol PM.
Consider trying Melatonin, or Magnesium to aid in falling asleep and staying asleep, if you haven't already.
Is your brother in law able to supervise and advise on spacing out the use of Diazepam, Tylenol PM and Gabapentin and share how they may interact if all are taken within the same day, possibly causing you to be overly sedated, drowsy or confused, I read there can also an increased risk of breathing problems? The Diazepam can cause respiratory depression especially when combined with other depressants.
Hopefully as the weeks progress, your pain and discomfort will ease, allowing you to gradually reduce the medications and feel more like yourself again. Healing takes time, but you're making progress and you'll eventually get to where you want. to be. Hang in there and have a great Monday!
@ACIM