How should i put my arms when getting a back adjustment?!

How should i put my arms when getting a back adjustment?

I've been having back pain recently and it's because of a disluxation in my vertebrae. I've had my little sister walk on my back at times and it usually helps me out. but this past week there's been a pain that won't go away.
it's kinda underneath my right shoulder blade so it's hidden from her weight. we do this on carpeting but I don't exactly know where to put my arms and head. should i be face down or head to the side. and should my arms be down at my sides, out to the side, or straight up in front of me? the pain is that of one of my nerves being crushed by some bone that's misplaced. but it's not centered on my back either, it's to the right. I can tell that it's not a sore muscle either, it's pressure on the nerve that won't go away. I'm constantly locking my hands behind my back and pushing my arms upwards. this usually cracks my upper back but this isn't helping either. but it feels like i'm on the right track. can any chiropractor reccomend a home remedy?

Here's an exercize that should give you some relief.
Lay on your back on the floor - on a carpeted floor.
Bring your knees to your chest and wrap your arms around your knees.
Tuck your head into your chest.
Now rock.
Gently
Just back and forth from your neck to your tailbone.
Do this for a couple minutes then stop, and rest on your back for about 30 seconds before getting up.
This will gently separate your vertebrae and put them back where they belong.
It may take a couple of sessions but you will actually start to feel your back relax and when you stop rocking and lay back you will feel the difference.
This is the same thing that happens when someone walks on your back - their weight causes the vertebrae to separate - but this is much easier on your body.