Develop your relationship with the Father, so you can see the thing that you believed for come to pass.
Take the time to get to know God through his word, and also become sensitive to his Spirit. There are times when he’s wanting you to change things in your diet or lifestyle that will cause healing to be appropriated.
James 1:5 King James Version (KJV)
5 If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him.