Lyrica helps to inhibit Stage 3
and 4 sleep, which is crucial for your body.
Elavil is another one that will inhibit sleep. I'll warn you that it does cause extreme sleepiness the next day so my doctor suggested cutting the dose in half to 5 mg and only taking it every other day if it causes you problems. Some people are fine with it, others can't tolerate it. It's worth trying though.
As hard as it might be, keep hanging in there. You are not alone in your feelings of desperation.