My heart's breaking all over again...

So here I am sitting on the phone with my mom... and my heart is breaking all over again. Last night was the hardest night I've faced yet. And while mom made me feel better about it, seeing it from a different way, I think it started the breaking down of everything. I think it started in science... how one little comment can break down walls that you so painstakingly struggled to build. Once again I feel that feeling in my chest as if something is physically missing. Like someone ripped my heart out of my chest and left me with the gaping hole. I feel like I'm spinning out of control, while maintaining a perfectly even keel. Though I will be ok, and I know that I will... it currently feels like the world could end today.