I've never had such a carb overdose, but I've heard of such a "hangover" effect after eating too many carbs. After awhile of eating low-carb, your body sorta goes into a shock when it's being flooded with a lot of carbs..

my suggestion is to drink a lot of water to clean out your system, and get back to a stritch carb in take for a few days.

hope you feel better soon.