Maybe a workout would help. Or anything physical that gets your blood pumping--your daughter may even be able to join you.
You could try working on not bottling it up in the first place. It may seem like the options are either grin and bear it or use hurtful words, but I think you could find a happy medium. And speaking of happy, no one is happy ALL the time. It's ok to be in a bad mood once in awhile. Sometimes just saying, "I'm in a bad mood!" can help, especially if it's followed by a reason, and "...but a hug from you would really be comforting right now." I think this would be a great model for your daughter.
You could try working on not bottling it up in the first place. It may seem like the options are either grin and bear it or use hurtful words, but I think you could find a happy medium. And speaking of happy, no one is happy ALL the time. It's ok to be in a bad mood once in awhile. Sometimes just saying, "I'm in a bad mood!" can help, especially if it's followed by a reason, and "...but a hug from you would really be comforting right now." I think this would be a great model for your daughter.