A couple hours ago, my other aunt called to tell me they'd taken her to the ER for the third trip in the last 10 days. Her advice was to get out to Michigan as soon as possible, in case things took a nosedive.
I'm currently in waiting mode. The aunt who called hadn't heard yet from the hospital on what was going on with my mom. It's entirely possible, they'd admit her, give her something, and she'd start improving. Regardless, I will be flying out there some time very soon, either tonight, or tomorrow. Even my brother, who hasn't seen or spoken to my mom in 15 years, drove to see her today. To me, that says it's pretty darn bad. He was very worried.
Please think of her in your prayers. I'm at a loss as I struggle not to assume the worst.