she said i need time ?

New here, after a minor argument I became defensive and left her apartment. my girlfriend of three years would not return my texts pr phone calls. Finally she texted me back and said she needs more time. We both have ADHD. I tried to make amends during phone message by taking responsibility for my actions. I'm going crazy trying to figure out what she means by this. I know none of you are in her head but maybe someone has been there. Any help would be appreciated. it has been about 12 days now. Fyi I'm 42 and she is 40....