My son had high fever and flu and 2 days later I started to feel like el crappo - like I have to leave work, etc. I started Tamiflu ASAP, took some Tylenol and was almost normal 24 hours later. Same conditions/situation for my wife and daughter.
I went through what you did, several days after my son had finished with the H1N1. I woke up and felt like CRAP. Took a shower, looked at my appointments, and wondered if I could make it to them all. This was in August. I probably did the wrong thing and tried to go about my day, feeling sicker by the minute. I wasn’t sure I could make it home. I had not ONE symptom I could describe except feeling REALLY SICK, quite “off.” A few hours later, I was feeling fine, back to normal. I still don’t know if I had it or not.