It’s wonderful that your husband and you are back together. Congratulations. Why would you not be forgiven? I hope you can find the courage to speak to a priest in Confession as the right beginning to your renewed Sacramental life.
If you married validly in the Church and have no annulment, then your marriage is still valid and sacramental. That is a wonderful thing, not a cause for “unforgiveness.”
Our dear God I ask Your powerful blessing on this couple. Help them to be wise and loving, to communicate well and lovingly, to overcome all obstacles, and to live in harmony with Your loving will for them
God bless you both,
Trishie