No problem. Hey, if you have her number, text her a 'hey um im sorry about what happened today I hope you can forgive me [[nickname]].' kind of message. Just a thought. I dont have a special someone so I couldn't say.
Well, to help with a mad person you care about, You should treat her. Ask your mom if you guys can go out to a restaurant. Make up like that. At like a café or something. Im just trying to think of things...