What are the symptoms of hypoglycemia…not in diabetes?

ok what are the symptoms of someone with hypoglycemia but does not have diabetes. Why are some people hypolglycemic but not diabetic? Could a reading of 76 after drinking 2/3 of a vanilla coke cause to be worried about hypo. or is this perfecto? thanks so much!
I drank it then took a shower and then tested so prob. 10 minutes after it was not right away