I was a newlywed too when my husband was diagnosed. I remember telling the doctors that I just married the love of my life and they had better guarantee me at LEAST 30 year's with him. I think I kind of scared them!
My husband is about 2 year's cancer free and we still both worry. I think it's only human...especially after what we all went through to fight this disease. I believe for you and your husband, it's going to take time. The longer he is cancer free, the more at ease you'll become.
Our priorities have definitely changed. My husband use to work 6-7 days a week. Not anymore! He takes more time to "smell the roses" if you know what I mean. We both have realized just how short life is, and we cherish each and everyday.
My husband and I both have to work. Unfortunately that is not an option, but we keep it balanced. We work hard, but work is not our life. Our marriage and being together is most important. I hope this helped a little. You're both so young to be dealing with all of this.
All the best,
Shelley