I'm doubting that it will work for me.
When you say, "it will work", do you mean,
you're doubting that God can heal?
you're doubting that he will bring you the healing that you want?
you're doubting that the Bible verses and/or formulas that you've been told to repeat will have any effect?
God's word says we are healed by the stripes of wounding that Jesus took. That's what it says.
Yes - and Isaiah also says that he died for our iniquities and transgressions. In context, he is talking about sin.
That is why Jesus came: to reconcile us to God; give his life as a ransom for many, Mark 10:45; undo the curse of the first Adam, Romans 6; bring us peace with God, Romans 5:1.
Through him we have eternal life, John 3:16, John 3:36, John 10:10, Romans 6:23. So when this temporal life is over, we will be with him, in his presence, forever. This is guaranteed - we have the Holy Spirit as a mark of this.
Having a problem, symptom free life on this imperfect, sin stained earth is NOT guaranteed. Neither is being free from sickness. It would be nice if it were; but it isn't.
It also records time and again Jesus healing all who came to him.
Yes, and the epistles also speak of people who were sick - close to death in one case - without any indication that they were healed miraculously. Like I said, Trophimus was sick at the start of one missionary journey. Paul did not heal him, he left him behind.
Years ago someone pointed out to me that what I thought was faith, was presumption.
"Ask God what he is saying to you in, and about, your illness. Don't assume that he has to take it away, or tell him that you will only be able to serve him if he does so."
I know that doubt and unbelief hindered Jesus's ministering.
And sometimes it didn't.
Jesus didn't always ask people if they had faith before he healed them. One man said "IF you can make him well ....." and then said, "I believe,
help me in my unbelief."
The man at the pool in Bethesda didn't even answer Jesus' question "do you want to be well?" He believed a local superstition about an angel stirring up the waters and made the excuse that he could not get into the pool. He had been there for 38 years. He could probably have crawled, shuffled or rolled, into the pool in that time had he really wanted to be well. He didn't.
I know the Gospels say that sometimes Jesus couldn't do anything because of unbelief.
But I also know that God's power is not limited by our thoughts and ability to respond.
I used to find it hard to accept that God loved me - but he didn't stop loving me just because I struggled to accept it. I didn't always believe in the Holy Spirit - but he didn't cease to exist because of that. Nor did my ignorance, or unbelief, prevent his from working in my life.
I read a book once in which the author was describing her time at a Kathryn Kuhlmann healing meeting. A man in front of her was swearing, openly blaspheming and didn't believe. He was healed, thanked God and became a believer. The author, who had had several "confirmations" that she would receive her healing that day, left in her wheelchair.