I have received healing, seen others receive healing, Andrew Wommack is a great teacher on walking in the gifts of G-d.
There is a teaching Jesus gave on speaking to the mountain, the mountain being a trouble or problem, speak to the problem about G-d, not the other way around.
Too often we speak to G-d about the problem when we should speak to the problem about G-d.
"Pain, be gone in Jesus name", Speak to the problem, let us know how He answers.
bless you in Jesus Name.