Thank you for asking. I can understand the distress you are through. The symptoms you are showing are suggestive of Depression. Irritability, low energy, sleep problem, low mood, etc are some important symptoms of depression. It is treatable. Suitable medication and instructions can help you overcome this problem.
Next Steps
Kindly visit a psychiatrist. Detailed history and work up of the problem is required.
Health Tips
Don't not worry it is treatable. However, if not attended in time, it may worsen.