It is very hard when you are ill , to understand how your husband could not be kind and empathetic . You would be , if it were the other way round. But for him it may be very different. People's personalities vary so much and what is easy and obvious to one person may be hard to tune into for another. For instance, some people are at home with detail and practical steps - good at answering how we should set about doing something. While others, who can do the 'how' and be practical, are more at home with the big picture, theories, and longer term vision. We can all do both! But often one feels more like us , than the other. In the same way, some people naturally respond from the heart, and care about impact on people, and others more readily respond from the head, from logic. Again, one is more natural to each of us than the other. I am guessing your husband is not naturally someone who responds from the heart : he may feel out of his depth when empathy is needed. This is not to say it isn't very painful for you - it is! But if you think of ways to approach life which don't come so easily to you, it may help. I have a good woman friend who is 'from the head' and once when I was in a lot of pain, I remember her clearly being irritated - as she says , she would not have made a good nurse!
It is also true that some people are, for whatever psychological reason, unsympathetic or unkind when someone else needs kindness - maybe a hang over from a needy or demanding parent - it is impossible to know what is going on for your husband. Someone once said to me you have three choices in a painful situation. : live with it, change it, or leave it. It might turn out that you can both live with it and change it, if you can see what may be going on for your husband - understand him better , without judging. You may be more relaxed then and able to open a conversation where you listen and ask him to listen, for understanding. I sometimes think that to listen deeply for understanding is hard to distinguish from love. We cannot make someone else change, but we can change ourselves, and when we do, sometimes others around us also change.