Heart Hurts

So yesterday Kimmy, Erin and I went to Jane's to make cookies. She was going to (and did some) roll the dough for us and nap as needed.
I don't know if it was because we were there- she always seems to do worse when there's activity going on, but she wasn't good. She just went down hill all day. She was up for a couple of hours and went to nap and woke up even worse- she couldn't breathe, she had one of her blackouts....she was GRAY. I've never seen her GRAY- going purple from lack of O2. I got her oxygen on her, but she was so so so out of it. :( I left shortly after that, and Kimmy said it was even worse later. She and Mike had to carry Jane to bed, she was absolutely purple by then. they got her in bed and a few minutes later Kimmy went back in to see how she was and Jane says "Oh, hi! I didn't know you were here..." We'd been there all day.
My heart hurts, hurts, hurts.
I want it to be over. We're all terrified that it will happen in January, when 3/4's of us are on vacation.
Mike is on leave from work until February.