INSOMIA OR STRESS?

How can I differentiate Insomia or stress? It is now 2:30 in the morning and still I am awake, I cant sleep, this is often happen to me..Is this insomia? or I am just very stress of whats going on in my life now. I don't know, perhaps I think too much. This past few days I am very emotional...I feel like I am betrayed by my boyfriend.Hhahahay,, I am confuse, I don't know is this stress? hahay ,,,I need to slap myself to be awaken telling how happy life is.....hihehhehe,, sorry I am just very emotional lately.....Good morning and Happy Sunday