If you have a hoop, it will be a complete circle, just as alkaline said. It should have been pierced with a hoop.
If you have a barbell, keep doing as you are doing. Move it up once, down once, and rotate it fully once. You should play with it as little as possible, thats why I say only do these things once a day. How fresh is the piercing? Twisting it may cause it to be a little tender at first, but it will eventually get better. If you dont twist it, the skin can actually grow to the piercing, and if this happens, taking the piercing out can be very difficult.
Like I said, at first when you twist it is normal for it to be a little tender. This is no reason to take the piercing out. Just make sure before you touch it to twist it, wash your hands really good with antibacterial soap to prevent germs and bacteria from getting into the piercing.
