I'm really sorry to hear about your husband's diagnosis and can understand why you are feeling scared but I just wanted to let you know you are not alone. Many members on the forum will understand how you're feeling having been in similar situations with their nearest and dearest and I'm sure they will post when they have a moment to offer you their support and share their experiences with you.
I have also found this discussion which you may want to have a look here where others are talking about their partners having stage 4 lung cancer too.
