Here is some help for you m8 ... i hope you will get ok with the pain
http://goo.gl/S7H9Mp
Before I naturally passed my 7mm stone I would have bouts of extreme pain every now and then. Even though I never tried pain killers, I found good hot bath in a tub would work wonders for me. Make sure the bath is as hot as you can stand it. I am just guessing why it works, (but I do know that it does) I assume the receptors that try to tell you the water is very hot help the pain be not so acute in a specific area (where the stone is stuck at the time). A good hot bath was my only reprieve on sleepless nights of pain. Slept in the tub. Something you may want to try if the pain gets to be to much.
If there is a position that will stop your pain, you will find it. For my current ureteral stone, there are two positions: 1) the pill taking position, and 2) the fetal position.
As for helping to dislodge or assist a stone on its journey, I think about this often. I have not found any studies other than the controversy over whether alpha blockers speed distal ureteral stone passage.
Basic physics would seem to indicate that gravity and hydraulic pressure are available forces to use on the stone. Therefore I try to drink even more than my usual 2 liters of water a day, and I try light jogging, or bouncing, and sometimes I attempt to vibrate the area where the stone is.
(Highly likely the OP has passed the stone, but discussing stones is another position I am using at the moment to stop the pain.)
If there is a position that you can get into to eliminate the pain of a kidney stone and you find one that works, please post it on here so we'll all know. I'm not trying to be smart mouthed with you but after 40 plus stones, over 30 years, I haven't found that position yet and I doubt you will either. .