Laurajean, everyone handles these things differently and at their own pace. There are no hard and set rules about how to react. If your DH is upset that's ok, he should be allowed to express his feelings. As he learns more he'll feel better.
Our own individual life experiences drive these feelings. Too often people stifle them because they don't know it's really ok; they feel they should be "strong" or "positive" and that's when it becomes a burden, they don't let them out. It's natural to feel scared when a diagnosis like this occurs and you don't know much about it. Hearing you have "cancer" is the one thing people fear their whole lives. I take care of people who are dying of heart failure who say to me they'd rather have that than cancer.
News like this is akin to going through a grieving process (even though you're not "dying" the process is the same): shock, denial, anger, bargaining, depression and eventually acceptance - everyone goes through these stages differently. You grieve the loss of your "health" (and even look at your future differently) when suddenly things aren't the way they've always been - individually, as a couple or as a family. It does make it a bit harder on you because you have your own issues to deal with and you feel like you have to be there for him too when you're the one with the problem! Give it a bit of time and just carry on the way you need to, he'll follow your lead.
A crisis cannot last more than three weeks, it has to resolve itself, remember that. So the way you and he feel today is different than how you will feel 3 weeks from now, but it may run the gamut of emotions (or none at all) between here and there. We see this type of thing in the hospital a lot.
Tammy, didn't you have this happen with your husband when you first got news of your recurrence?