From my experiences and my family member's experiences with low-blood sugar, it takes a long time for the body to regulate. My father says it took him almost two years to feel back to normal, and I've been on a hypoglycemic diet for four months, and I'm definitely much better but not great. It takes time and persistence and patience. One day of good eating is helpful, but you need to keep your diet up for many, many months. I drink no caffeine or alcohol, and I eat as minimal sugars as possible — I know, it's absolutely no fun, but I'd rather be healthy than a shaky, panicky, dizzy mess.
I wish you luck. Don't give up!
