Sorry to hear about the whole ordeal, especially about the your mother.

And the hysterectomy. My best friend's mum had to have one recently.
But I like this ready approach you're taking to all your other symptoms. It keeps you safer from risks, and I really don't think you have much to worry about with the cancer and all. One of my friends' mother has had a tumor in her for a couple years now (doctors waiting for it to grow) and she's been doing fine.
You should really have your husband to stay with you, I'm sure your neighbour or someone wouldn't mind picking up your son at all. You need your husband to stay by your side, even if he says he doesn't want to think about it.
Hope you enjoy your holidays anyway, and do let us know!