One of the ironies of sorrow for sin is that if one is sorrowful for sin they are on the path to forgiveness. When forgiveness comes the sorrow is gone. Sorrow for sin can be short lived if one repents quickly. Real sorrow for sin comes most to the unrepentant. I believe the prophet Mormon? spoke of this type of sorrow. my 2 cents.

Good question…

Remember Alma who was wracked with torment.

Alma 36:14
14 Yea, and I had murdered many of his children, or rather led them away unto destruction; yea, and in fine so great had been my iniquities, that the very thought of coming into the presence of my God did rack my soul with inexpressible horror.