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 griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted. 5 But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.
MISTRANSLATION IN THE ORIGINAL KING JAMES VERSION
The words "griefs" and "sorrows" are the Hebrew words that are literally "sicknesses" and diseases." Dr. Isaac Lesser's translation of The Hebrew Bible, a translation authorized for use by Orthodox Jews, reads: "Our diseases did he bear himself, and our pains he carried: while we indeed esteemed him stricken, smitten of God and afflicted."
Matthew 8:17 - King James Version (KJV) 17 That it might be fulfilled which was spoken by Esaias the prophet, saying, Himself took our infirmities, and bare our sicknesses.
Matthew is quoting Isaiah. We know that Jesus was made to be sin for us (2 Corinthians 5:21). The object of His sin-bearing was that we might be free from sin, and the object of His sickness-bearing was that we might be free from sickness. This truth is also reflected in First Peter 2:24:
1 Peter 2:24 - King James Version (KJV) 24 Who his own self bare our sins in His own body on the tree, that we, being dead to sins, should live unto righteousness: by whose stripes ye were healed.
Thus, three witnesses -- Isaiah, Matthew, and Peter - tell us not only that Jesus shed His blood for the remission of our sins but that with His stripes we were healed.
OUR LEGAL RIGHT TO DIVINE HEALING
Not only is healing in God's "redemptive plan," but because Jesus sealed the New Covenant with His own blood, we also have a legal right to divine healing (Hebrews 8:6, 12:24, 13:20) The New Covenant guarantees us the rights and privileges that Jesus secured for us, which include divine healing. In Mark 11:24 He said, "What things soever ye desire, when ye pray, believe that ye receive them and ye shall have them." Therefore, we have a prayerful right to divine healing!
Then in Psalm 23:5, the Psalmist talks about Jesus as our Redeemer, saying. "Thou preparest a table before me in the presence of mine enemies." Therefore healing is our provisional right -- our Heavenly Father has prepared a table of provision for us, and it includes healing.