My heart is filled with joy thinking of that wonderful hymn. I am happy for you in that you’ve come to know the truthfulness of this glorious gospel, and I pray that you will be steadfast in your trials and tribulations.
Faith my friend, faith. All pain is uncomfortable, and not favorable. Trust that the Lord will not allow you to run faster than you can. Patience is a skill that must be developed. You may or may not discover the reason for your trial in the near future, but trust that there is indeed a reason. Trust Him.