About once a month for the past few years (I just turned 16, if my age matters) I've been getting chest pains near where my heart is, and at the same time I'll become extremely irritable with an urge to just break things and throw things around (but I don't, I usually just sit down and try to calm myself). These things seem to come out of nowhere, and usually only last about five to ten minutes (though I've had some that have lasted almost an hour). Afterward, my chest will still be a little sore when I breathe deeply, but otherwise I'll be perfectly fine as if it didn't happen at all.
I don't think there's something physically wrong with me (like a health issue), and my mother suggested that I'm probably having anxiety attacks... but I don't have anything to be anxious about. Are they anxiety attacks? Could they be something else? Are they nothing at all?