I am so, so sorry. How unbelievably cruel that you have to go through this when already feeling vulnerable with your own health. You have many things you are processing and grieving right now.
I don't know if you want advice, but after having a close friend go through it, this is what I would say.
You start making plans. You get your DH to write a list of things he would regret not doing.
Things like letters for the kids for their 21st birthdays or their weddings.
You make sure wills and insurance is up to date and you have his passwords for everything.
You tell the kids before things get too bad, so they have time to grieve before the end.
You book yourself time to have a bath and cry and release. Then you get up the next day and work your way down that list.
You can do this. You will be okay and the kids will be okay. You will never be the same again, but you will be okay.
Nothing about this is beautiful or the other bullshit that people say, but it can be done well. This process, this journey will be what you and your kids remember for the rest of their lives.
Which is a lot of pressure and you are having to be everything for everyone. So start simple. Start with what you can control and achieve.
Sending you an un-mumsnetty hug or handhold 💞🫂