I am so sorry to read about your wife , what a worry for you and yes, it can be a minefield ! If her BG level was around 30, then it was very high indeed and no wonder she was poorly . The first thing she needs to address is medication and diet , does she take any meds at all and is her diabetes checked ? It is widely thought that all carbs can contribute to a high BG level and certainly, for me and many countless others, cutting right back on all forms of carbohydrates makes for good control . There is some great advice and info on this forum and website which you both need to read and heed , its good to know that you are taking an active part in helping your wife, she needs support, its a huge help .