I'd get my ass to the hospital and tell her how sorry I am and hope that she can forgive me.!
This reminds me of when my Best Girl Friend and I got into a huge fight. It was not to long ago when it happened and what made us get back together was a high school friend who had lost her life to cancer. It really hit home and I could not stop thinking "What If" that would have been her! I could not have lived with myself having her not know how sorry I was for doing something so stupid.
I love my Best Friend with all my heart and it broke my heart when she would not talk to me. Things were said and feelings were hurt but I knew how I felt about her deep down and I didn't not want to loose that friendship and I truly could not live without her knowing how sorry I was.
It took sometime but we eventually worked things out and are back in each others life. We need each other and cherish that we were given a second chance at our friendship.
I truly don't know what I would do without her and I know she feels the same. She's my Best Friend and I am so lucky to have gotten the chance for her to forgive me and move on and be the friends that we are today!
Love You Dear!