I was sealed in the temple years ago and later divorced. I no longer attend the Mormon Church. Later as a single mother, I had an abortion. Have I committed an unforgivable sin? Lately I have been fasting and praying a lot. I am trying to return to a wonderful relationship with my Heavenly Father, if he will have me? Have I lost a life with God now and forever?
Not in any way are you lost from God! Read here the words of the Lord as recorded in Isaiah 1:18-20—
Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool. If ye be willing and obedient, ye shall eat the good of the land: But if ye refuse and rebel, ye shall be devoured with the sword: for the mouth of the LORD hath spoken it.
But as you will note, a return to a relationship with your Heavenly Father is essential to the peace that you seek. The Lord requires us to “come unto him” if he is to forgive us and bless us. If you no longer attend the Mormon Church, it is not that He has left you, but you have alienated yourself from Him. Fasting and praying alone won’t do it. You must DO what He would have you do. You seem to be repentant for what you have done. Abortion of course is a terrible sin, but it is by no means unforgivable. If you want the Lord to forgive you, then do what He says. Be kind and forgiving to others. Participate in the affairs of the kingdom! Associate with others who are also struggling to be obedient to the Lord and to do the right thing in their lives. And as you yield obedience to the principles of the gospel, you will feel His Spirit and come to know that you are forgiven. He has already paid to the Father the price or your sins.