Emotions

Does anyone else get emotional sometimes for no reason... or for a lot of reasons but none that really make sense?  I know that when its "that time of the month" girls can be emotional for no reason, but sometimes when its "not that time" I get super emotional. Like, randomly on the way home from the gym I was driving and a good song came on my ipod-- I literally started bawling. It was awful. I can't even tell you why I was crying, but it took me a few minutes to get it under control. Its weird. I didn't feel sad, or upset, or whatever. It just happened. Am I crazy?