You do not have insomnia and this is an insomnia forum. Therefore, you need to be evaluated at a sleep center.
Dr. Jacobs
You can try CBT for insomnia per my posts and website.
cbtforinsomnia.com
Your symptoms sound physiologically based or anxiety based since you describe physiological symptoms that are distinct form insomnia. Since your doctors find nothing wrong, follow through on the suggestion of evaluation for anxiety.
Dr. Jacobs
Because you are taking large doses of prescription medication that can be dangerous, you need to be evaluated by your doctor right away.
Dr. Jacobs
This is an insomnia forum and hypnic jerks are seperate from insomnia. They could be periodic limb movements and need to be evaluated by a sleep physician at a sleep center.
Dr. Jacobs
Since the pain is causing the insomnia, your doctor will need to diagnose and treat the pain.
Dr. Jacobs