Restless leg syndrome is very normal for someone that is in their 30th week of pregnancy, it is your bodies way to get you used to little sleep when the baby gets there and also it is a way to help you learn to cope with the pains of childbirth.
You case is extraordinary becuse you have also had severe trauma to your spine and that is also a common factor in rls. I am a man and have suffered low back trauma and because of the pain in my back I developed rls and that was treated with nurontin 300mg three times a day until 2 months after surgery.
Now I am on muscle relaxers (cyclobenzaprine) and pain medicine (percocet 10/325) and anti-inflamitory medicine (motrin 800mg) for post-surgical pain.
Thankfuly they have been able to treat your night pains and you are able to sleep now. Rls is horrible and no one should have to suffer it untreated!