It sounds like you are grieving for your lost marriage, and my condolences to you. My husband died two years ago, and my drinking got dramatically worse. Alcohol takes pain and insomnia away initially, but causes rebound symptoms of them before too long. Grief doesnt mix well with alcohol. Perhaps the mornings you don't have hangover are when you have eaten well the day before, and vice versa. I think a visit to a doctor would help. Best of luck to you.