5 weeks after diagnosis

My dad died of Lung cancer on Wednesday 5 weeks after being diagnosed. He was due to start immunotherapy on Friday last week. Just in total shock. We thought we would have more time and didn't know he was dying as he didn't want to know the prognosis. My mum found him Wednesday morning. Finding it really hard to accept at the moment. Thanks for reading and I am thinking of everyone dealing with this awful disease one way or another.