I would leave her alone for a while. Don't have any conversations whatsoever. Leave notes if you need to communicate. Cool off. Focus on GAL and detachment.
I've been there and you can't change what you've done. A part of her knows that you have a right to be upset. She will see that in her clearer moments.
A verbal apology from you at this point won't really help anything. If you think it appropriate, you can put a brief apology into writing and leave the note somewhere for her, but even then, I wouldn't make the apology the only point of the letter.
Best of luck.
The LORD is near to all who call on him, to all who call on him in truth." (Psalm 145:18)