About 10 years ago my twin sister called me and told me she had taken an overdose of pills. I'm ashamed to say I was annoyed with her. This was not her first suicide attempt and I didn't really take it seriously. I had just had my first baby, and I actually took the time to feed him before I went to her house. I didn't call 911 or anything.
I arrived at her house at the same time her husband did. He was the one who wanted to take her to the hospital (and I'm grateful he did).
I remember how I felt that day, and part of it was denial (she'll be ok, she just needs to sleep it off), part of it was embarassment (I was much younger and not very smart, I guess), and part of it was fear.

I don't know if that helps you at all. I love my sister dearly and in retrospect I can clearly see how wrong I was in the situation. I didn't act properly and let my feelings get in the way of helping her, but it wasn't because I didn't love her.
Maybe your husband will feel the same way.