Jesus not only redeemed us from sin, He also redeemed us from sickness. So it is God's will to heal you. Never doubt it, because healing is in His redemptive plan.
The Bible says that in the mouth of two or three witnesses every word shall be established (Matthew 18:16). The following texts from Isaiah, Matthew, and First Peter all agree that Jesus took our infirmities and bore our sicknesses:
Isaiah 53:4-5 - King James Version (KJV)
4 Surely he hath borne our gri