You must not do anything silly. If you husband is smart, he will get over it and things will get back to normal. If he is not, he is not worth having. There is nothing that you should die for.
We build our life around career, health, family, friends and love. If one is going down, try concentrate on the others.
Take heart and be strong. Get help and speak to the Good Samaritan or some social workers. Do not do anything silly. Try looking at the matter from outside and give youself some advice as if you were an outsider.
We all have out ups and downs in life and the bright side may just be around the corner.