How to apologize to my girlfriend for ditching her while she's annoyed?

I used to get like this all the time. Does she have mental disorder? I was diagnosed as having severe anxiety & panic attacks. It became so bad that my husband & I filed for divorce! I was put on medication & my whole perspective on life in general has improved. I am happier with all aspects of my life. I don't get upset over things I can't control. I even had the motivation to feel like my life meant something & I went back to school for my degree. Ask her to see a doctor. She might need medication! It could help out a lot! I'm living proof!