We all support you and you should have enough advice and information help you decide what direction to take. I would only say that before you do anything drastic, do talk to your husband's doctor. He won't be able to give you any personal information but you must let him know the changes in your husband's character. You obviously can't continue like this. (If he's still working it may be affecting his relationship with colleagues or clients as well - and his prospects.)
Medication can have astounding influence on a person's character. For instance some treatments for Parkinson's can manifest severe bi-polar symptoms. A change in medication and help coming to terms with his illness may make things bearable.
Things you find stressful that other people don't notice.