Welcome Luna
Good you corrected those diet names, had me stumped as I tried to figure out where spell-check was coming from with those.

A forum is more organized than what you are currently using, and it keeps 15 years of answers. If you enter from this index page: http://forum.lowcarber.org You will see all the topics and what is active. Under the topics can be threads that go back for years...continuity on one topic that you do not get from Twitter or FB.

You can find posts on AutoImmune diseases, Fibro, etc. in Low Carb Health Forums.
The Carnivore diet is controversial so a Zero Carb thread was started in "war zone" in 2016. http://forum.lowcarber.org/showthread.php?t=471960
The Ketogenic Diet name has come into common use, though the Atkins induction phase http://forum.lowcarber.org/showthread.php?t=236482 , Dr. Westman's clinic version of it https://www.dietdoctor.com/se/wp-co...starch_diet.pdf , etc are all "ketogenic diets" so this forum doesn't have a one stop place for it... most very low carb diets are "ketogenic".

This is a great introduction to LC and Keto diets. https://www.dietdoctor.com/low-carb/keto Look under side-effects for Keto Flu and what to do about it. I avoided any keto flu by having two cups of salted bouillon as per the Westman ketogenic plan followed.
But since you ate a big bowl of carbs it could have been reactive hypoglycemia.

Look all around. There are answers to Newbie Questions or read back through some threads on the Atkins or General LC sections.

Be sure to keep notifcations on..you will get a daily email that show posts for any thread you posted on (like this one). The link will take you right back to it..no need to look around the forum.

All the best,