Thank you both for the warm welcome and replies..... I think I've found a new place to hang out.

Yes, I think the panic part sets off the digestive crisis, but I've tried to figure out WHY I have the panic and purging during these episodes. Is it an excess of insulin? Is it an adrenaline jolt? When I say the first symptom I notice is a "jolting" dizziness, it is truly that intense and quick.... it can sometimes make me grab onto my desk because I think I'm going to lose my balance, but only lasts a second. What is that jolt? The crash? Insulin? Cortisol? Adrenaline?
To answer your questions, Lamont: I have tried everything under the sun to manage my colitis with as few medications as possible. The only thing that works like a charm, every time, is steroids, but those are evil in other ways so I am on a very, very, VERY low dose right now just to "maintain". I have tried giving up dairy, giving up gluten, eating paleo, eating vegan..... you name it. Giving up dairy and gluten certainly helps the colitis so I've stuck with that for the most part.
About 20 years ago I did Atkins to try and lose weight and it was successful. But after 9 months I started having some medical issues and my family, friends AND DOCTORS strongly urged me to "get off that stupid diet!". Being desperate, and not having much scientific evidence on low carbing 20 years ago, I gave in.
About 6 months ago while I was struggling to find a way of living that would make me feel my healthiest and happiest I remembered that while doing Atkins, I had never felt better. Good energy, good mood, and very few blood sugar swings. I decided I should do it again (now that there are more people doing it - I was pretty much alone back then and there were very few low-carb options in the stores). I started reading about ketogenic diets and went for it. I'm still doing it. Due to a failure with my breathometer I ended up falling out of ketosis about 3 months ago so pretty much had to start all over. I'm back in ketosis but not yet "fat adapted". Hopefully when I am, I won't have any BG spikes or crashes.
I actually don't have them all that often right now, but what throws me and scares me is WHY they happen when they do. I couldn't think of any good reason for having such a miserable day yesterday. So the "unknown" and unpredictability of an episode being able to ruin a day (and plans) like that really frustrates and scares me. I have a full day tomorrow with other people and I'm anxious about not feeling well enough to do it. Yes, that's the anxiety I've dealt with for decades rearing it's ugly head. But honestly, if I can't figure out WHY I crashed yesterday, how can I prevent it from happening again?
Regarding how I was instructed to handle my RH? I've never been "officially" diagnosed by any doctor and I'm not sure any of them truly recognize it as a problem so I don't even mention it anymore. I just handle it on my own with diet.
How do I handle both RH and colitis? THAT, my new friend, is the hard part. A keto WOE would be SO much easier and pleasurable if I could eat dairy. Or if I could eat salad or raw vegetables. As it is, there are very few vegetables I can eat without triggering my colitis. My typical day is not to eat breakfast, have meat and a small amount of veggie for lunch, perhaps some nuts for a snack, and then meat and veggie for dinner. Boring, yes, but keeping me in ketosis.
Sorry, I'm sure you weren't looking for a mini-novel but I got carried away. Ask all you want - I love being here and sharing.
Sue