According to my faith

I was reading in Matthew 9 today when I saw that Jesus healed according to other's faith.  Jesus healed a paralyzed man in Matthew 9:2 according to the faith of the men who brought him.  Jesus told a bleeding woman that her faith healed her in Matthew 9:22.  In Matthew 9:29 Jesus healed two blind men according to their faith.  I wonder how many miracles and answered prayers I've missed out on because I didn't trust God enough?