Heather,
I probably can't offer you any practical advice, but I thought I'd try giving you some emotional support.
I have periodontitis, and I thought I was doing so well with it---I've been having great checkups and my pockets were shrinking---but since Wednesday I've been having one of the worst tooth/teeth infections I've had in a long while, maybe ever. I've been megadosing on ester-C and I think, I HOPE, it's slowly getting better---managed to eat a few sandwiches yesterday, but not without significant discomfort. But it's been making me more seriously consider dentures myself, which have been in the back of my mind for a few years now.
So I'm always looking now and then for personal experiences with them. I've read horror stories like yours and also of some perfectly wonderful experiences with them. I've also worried about having to go "toothless" in front of people---my vanity would hate that. Why can't you just wait til your "good" dentures are ready before your extraction? Is the extraction done all at once? Or do you have to go with varying degrees of toothlessness for days or weeks as it's done gradually? Do the dentists give you some sort of video---hopefuly not too graphic---that "walks" you through the process, giving some sort of timeline to the process from start to finish?
Well, I don't want to overwhelm you with all these questions when you're feeling so bad. I know how stressful dental problems and DENTAL WORK can be. I wish I---or somebody else---good give you some good and FAST advice on how to deal with your situation. I've often been disappointed in how little support you get on this forum---all the "0"'s in the "Replies" boxes.
Hang in there, and good luck.