Yom Kippur: Fasting and Health

I just had a serious medical procedure (on Rosh Hashana, ironically, but that's when it could be scheduled). I am on a new medication and on a greatly increased dose of one of my accustomed medications. And I am a diabetic.

I will be consuming a small amount of food today and some water, not fasting entirely, as is the commandment.

Rabbi Ruth Adar, the "Coffee Shop Rabbi" blogger, addresses this; see If I Can’t Fast, How Can I Observe Yom Kippur? (from 2013) and Approaching Yom Kippur (from yesterday).

I still feel guilty about it. But that's tradition too. :-\