What do I do about my REALLY BAD nervous laughter?

Well sorry but it is funny. What I understood from the title that it is a nervous laughter. So its just not out of no where its when you only nervous? If so then it is all in your head, one thing you can do is to try to change the thoughts that are in your head to something else, i.e something you wanted to do, homework you need to finish, just anything to change your thoughts. Sorry that's all I got.