Hello OP - apologies in advance for the long message!
I had something similar happen to me about 11 years ago. It turned out to be a sudden reaction to methylisothiazolinone. MI is a synthetic preservative and it is in nearly every cosmetic product, as well as some paint. We can tolerate it for a long time and then suddenly develop a severe allergy to it.
I had used a sunscreen on holiday and my face became hot, dry, itchy and felt like it had been sandpapered. My skin puffed up, eyes were really swollen and the reaction took weeks to clear. I had no idea what it was, the products I used that day were existing products I had been using already.
Over the years since I have experienced several "attacks". I have to be very careful, looking at ingredient lists. I've had attacks from reacting whilst using paint (affecting breathing as well as causing face swelling etc) so I now outsource any paint jobs to professionals and try to avoid the rooms until dry and air them thoroughly.
I dropped the ball on checking a facemask in April this year and had an extreme reaction, the worst ever, with my face completely swollen and my eyes completely swollen shut (scary!). My doctor was so alarmed she actually yelped "oh my god" when she saw me. I had to take 6x steroid tablets for seven days. I was honestly unrecognisable and in a lot of discomfort.
I've been extra careful since, but sometimes I just don't know what I've used to cause a reaction and then put it down to using hand soap in a restaurant or similar. I try to use "natural" products as much as I can now.
I know how rotten it makes you feel.