Exactly the same thing happened to us. My youngest daughter was in town and we had dinner Christmas Day with her and her fiend and her Mum. Her friend had bad flu and my wife and I 2 days later had exactly the same really bad for about 3 days. An ER Dr who my wife worked for also had it. About a week ago my daughters friend went to ER with high temp and stomach cramps. She got tested and found to have Corid-19 antibodies. Her temp went down after 18 hours and she was fine. Did we have it? My wife and the Dr she works with thinks so. Since then they have worked with Corid-19 patients every day and to this day are OK.