I am so very sorry. Your post is concerning to me on a number of levels.
I do hope that at the very least your husband would consider seeking medical information here or on line. Sometimes doctors need a little push to try different things themselves and in a gentle way he can offer off information he finds to their attention. In addition, prayer for ourselves and those of others can only help. I do think studies prove this to be the case. So, it is wonderful that you have asked. Please keep pushing forward. And keeping all this in mind, I have just said a special and powerful prayer for you and your spouse.