Those who seek healing from the Lord will get it.
All that is required of us is faith. We must believe that He can do it, and that He wants to.
The delay is doubt.
Often, when we believe, we are also doubting. It's usually hidden, yet we can sense it's there.
So we layer pride on top of it by trying to prove that we have unwavering faith, when it is actually wavering.
Masking over doubt doesn't eliminate it; it gives it a cozy home, allowing it to continue preventing you from receiving from God.
The only way to get rid of doubt is to expose it.
Bring it out into the light by humbly asking God to help you with your unbelief.
He'll take you to the root of it. And it might be painful. But if you'll allow Him, He'll remove it so you can receive healing.