I thought I may have had it a little over a week ago, but I didn't have much of the stomach problems, only at first.
The rest of the day felt like covid, only without the cold symptoms. Just drained, no energy, Hot and then cold. headache that didn't go away for a day, I kept parking myself on the bed or couch and falling asleep for an hour at an time.
I even didn't go to work for 2 days thinking it was covid, because that's how it felt when I had that over 2 years ago, only with a nasty cough and more severe chills for a couple nights.
By day 2 I was feeling much better, but still had the nasty hangover feeling and was tired all day. Like I didn't feel as low on energy as the day before, but had the tired, hangover feeling, probably from being drained from my body fighting off whatever the entire day before.