I am sorry, however, to me, it would not be in your best interest to visit her in first place.
It's like if you keep scratching an open sore, the most you scratch it, the longer it takes to heal.
Recovery from codependency is hard, hard work, I imagine that I will be in recovery the rest of my life, somehow, I am going to beat it, I must, for me, as you must do for you, your well-being, not to mention that of your GD.
Sending hugs and support your way....As Ever....Dolly