Follow up: I was lucky. Swelling was gone in 2 days. No itching and very little redness. My husband never even noticed.
There is an interesting article in the June 2020 issue of Bee Culture Magazine. The article,
Bee Venom, by Ed Simon discusses normal to severe reactions to bee stings. He tells the stories of 2 different beekeepers and how they went from normal to severe in a short time. For further reading, he has included links to articles with which he has drawn information from. Simon states that some beekeepers become desensitized to stings, for others it can go to the other extreme. Some of those warning signs are listed as well as what to do about it.