Emotions come out the way they come out. Worrying about it is going to make you more nervous and more likely to let out those emotions. I know it makes you feel bad but it would be more worrying if you had no emotions at all. I remember years ago when there was a tragic death of a young teenager, his brother who was a few years younger laughed all the way through the funeral. It's a strong emotion like crying, it was his emotional way of dealing with the death of his brother. The emotions had to come out somehow...