I also just wanted to add a testimony to this thread. It is something that is still tender in my spirit and that the Lord is working with me on.
About a year ago, there was a co-worker who's young wife and mother who was fighting breast cancer. We had been lifting her up in prayer for a couple of months. One morning, while I was praying, reading and talking with our Father, I asked Him if He would heal this young woman. He said, "Yes, I will heal her". I was so excited that I came to work and shared with many other Christians. A few months later, she passed away. I was shaken to the core. I totally lost my faith in hearing from our Father. I know my God heals and I felt like I must have not had enough faith or something and that I did not hear Him at all. God sent a word from a trusted Christian sister to tell me that I did hear Him correctly. He said that there was more than one type of healing and her's was spiritual. I realized I had lost sight of the main goal, salvation. I was so focused on healing that I never prayed for her salvation. Praise God that His Spirit prays for us when we know not what to pray.
My all time scripture for situations such as these are:
Isaiah 55:9 For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts.
God is a wonderful loving God.