It's okay to be sad, and it's okay to mourn! In Matthew 5, it specifically states "Blessed are those who mourn, for they will be comforted.". Everybody is thrown into turmoil, and when something as especially hard as this comes along absolutely NO ONE in their right mind can expect you to just be okay. As Christians, we know our loved ones who have long passed are waiting for us in heaven, but sometimes all we could want is a hug from that person. It's okay! Death is one of the toughest things we as humans go through in life but as Christians we stand to look it straight in the eye, and we fight. We fight, we fight for heaven knowing full well with Jesus by our side that we WILL win. Though everything may seem lost right now, I can imagine your husband up in heaven, standing there, with open arms ready to greet you. All is not lost. He has not lost the battle to cancer, but has won the battle through Christ to heaven. Until the day where you get to meet again, we as your Christian family, are here for you, to fight beside you, to help you look death in the eye and overcome this. You are strong and powerful, just as he was and is today, and you can fight the fight too. You will overcome this. You will overcome death. Because you can. And if it takes mourning to get to your goals, so be it! Whether it be a month, a year a decade, or a lifetime. After all, even Jesus himself mourned throughout the Bible, no? Through God we are stronger than death, no matter in what form it comes, and we will win the battle no matter what it takes.
As far as recovery, there are greif groups in churches, and Christian therapists out there to help fight the pain. If you need to pour into strangers, do it! As a Christian service, this is what it is for. We are here to come together as the body of Christ and to be there each other when we need it.