First of all, you could call HR yourself, beat them to it, and explain what's happened.  You have no obligation to tell anyone what you were in the hospital for, nor can your doctor or hospital divulge that kind of information unless you give them permission.  Do you have a department like Employee Assistance?  Some bigger companies do and they can be quite helpful in situations like this.

When I was on a leave for depression, I did tell my boss what I was going out for, but when he tried to subtly refer to it in my next performance review, I talked to his boss and said that if he was saying I did meet the requirements of my job, then saying that I had been out on leave was irrelevant, and he agreed.  I also went to to higher management a couple of times when another boss was trying to use my depression against me.  They were quite empathetic and I think if you can be honest about it with the people who matter, they will respect you for that and are less likely to imagine how "sane" you are or aren't.  That helps dispel stigma, too, for everyone else.

Good luck with this, let us know how things turn out.  You shouldn't be "punished" because your husband didn't make that call.  I wish you all the best.