Don't know if it's bipolor syndrome

Could it be that you are going a difficult situation ? A stressful period in your life ? Maybe you are dissatisfied with your life choices and are scared to make a change.. I think you should really try to sit with a specialist or even yourself to get to the bottom of the problem. It could even be hormonal balance( happened to me more than once) that is causing you so much sadness.. See a doctor. Check that physically you are ok before exploring theemtal side of your dilemma.