Helen,
Glad you joined us. We are ALL different. It "hits" each of us differently and all we can do is process in our own way at our own pace.
What happens a lot is that couples each try to be the strong one for the other and they don't share how they really feel. Other times they share and the other isn't ready to hear.
Example>
Spouse: I am afraid of losing you and don't know what I'd do if you died.
Person with cancer: Well gee, apparently it's all about you! I'm the one with cancer you know!
The above can and does happen. At the same time, the above is sometimes thought but never said. It is perfectly normal for each person to think about it from just their own perspective (patient: I don't want to die; spouse: what happens to me if he/she dies) as well as (patient: OMG, what must he/she be feeling now? How can I lessen his/her fear and worry? Should I share my feelings or will that just scare him/her more? spouse: OMG, what must he/she be feeling now? Should I share my feelings or will that just put more of a burden on him/her when he/she needs all their strength to face this beast?).
BUT, a strong relationship can get past that and a middle of the road relationship can get even stronger.
Emotions are all over the map for both people in a couple. Sometimes it is hard to talk about and other times it is easy. Timing is everything.
Deciding how to tackle it (the cancer treatment) together can be helpful.
Cutting each other some slack is also important.
As you each learn more the fear will reduce. View this as a team.
As has been said, your husband's at a very treatable stage. Even the next stage is very treatable even if the treatment is more aggressive. Mine went to the T2 (muscle invasive) stage and I had to have my bladder removed, but today that is no big deal and I'm going on four years cancer free.
Based on the concern and posts I've read from both of you, you guys are going to make it through this together just fine. There will be ups and downs and you are going to get even closer (hard to believe, huh?).
Mike