@Flyfast56 We never know how we would react to circumstances so, I am going to tell you, not what I would do but, what I would advise someone close to me to do, if they asked for similar advice.
Make a new appointment for the scan. Speak to your consultant or GP. To be honest, you sound depressed.
Send your children Birthday and Christmas cards, wish them well and always put your contact details on the back of the card. You may never hear from them but, at least you are keeping the door open for them and they will hopefully appreciate that you continue to reach out to them and, they may well return the gesture one day.
At 68 you hopefully have many years ahead of you, don't waste them. Explore any possibilities to build a social life, make friends and just enjoy life. Get a dog or a cat or volunteer to help out in a local shop, charity, wherever - in short, you need to try and reconnect with life.
Hopefully you will enjoy this forum.
I wish you well.