There is an old saying "Necessity is the mother of invention." I faced same situation, solved it and got substances to serve readers of this site like you. Just guess what may I have done? It's easy more than you think. Yes, it was self hypnosis which replaced painkiller and made me feel relax.
You should not be necessarily a doctor to apply this simple treatment. But if you have a bit background at least as a self reader of hypnosis, it is easier. Now learn what can you do in that situation described above:
_ Stay somewhere by supporting your back comfortably.
_ Close your eyes and take long breath in and breath out for a while.
_ Start visualizing your whole parts of body are taking rest one by one.
_ Visualize a garden where you are feeling relax, entertaining and doing so many other things which can make you pleased.
_ If you feel relax be back from the hypnosis by saying 1, 2, 3.
_ Repeat process till you feel completely relax.
If this is your first experience, you may feel difficulty to go into deep trance. You had better learn self hypnosis right from today. Read some other articles of hypnosis in this blog and also search other resources on the web. When you become perfect, you can do so many miracles like this in your life.
Discovered by +Don Prince