Holly,
I stumbled across this thread, and although it feels awkward to comment on something which is so personal to you whilst not knowing you at all, I will do so anyway:
Firstly, I am very sorry to read that you are in a state of mortal sin. I will pray for your swift return to a state of grace.
Secondly, if you have time, I would urge you to read the parable of the Prodigal Son in Luke 15 and to meditate on the love of the Father shown therein. That is the way that God loves you. The younger son’s attitude is an example of imperfect contrition if ever there was one, but everything is transformed by the Father’s love. The more you are aware of God’s love, the greater and purer sorrow you will have for your sins.
Thirdly, for what it’s worth, the distress your sin appears to have caused you suggests that you are close to perfect contrition already. But as others have said above, it is a grace from God. So put all your trust in Him and speak with Him honestly. Since you desire to restore your relationship with Him, He will not leave you alone.