Embarrassing outbursts in Life and what goes through

As I had promised myself, I did go to the faculty to talk to them. I had a long conversation with them explaining why I wanted to drop out of the course and why I am approaching them so late. They were like you are being too casual about it. But in the end, as I dreaded, I teared up. I don’t know why I do this! Whenever I have a difficult situation, I tend to tear up and my voice becomes heavy. I tried so hard to control them. But no! As I was giving more explanations, I teared up even more. What is this logic - I fail to understand. Is it that I often don’t express myself and when I do in these situations, I tear up.. I doubt it.. But it gets so embarrassing. It helps me get my way, but simultaneously creates an image that I being a girl can’t handle myself or how I am going to face the corporate sector in future (which I already have for 3 years before joining the MBA course, where again I have had one of these emotional outbursts, a really bad one I might add). I have to work on this. I just need to learn how to deal with my emotions when in a bad conversation. Rationalize!! One more conversation to go today- hope that does not go as bad as this one!