Within 2 hours of taking an antibiotic, I felt somewhat better. Woke up this morning with a temperature of 98.8. Felt a little bad throughout the morning, but didn't want to take any Tylenol, to see if the temperature went up. At lunch, I started feeling better, then I took Tylenol around 1:00, as I usually feel worse later in the day as I am getting better from something. But, since it's now after 9 PM and the Tylenol has long worn off, I feel better, no trace of fever.
I am thinking I might have actually had the flu, a mild version, because I did have a shot. I have never experienced such a sudden onset of horrible body aches and a fever, except for when I had the flu in 1993. That was 4.5 days of a 104 degree fever that came on so suddenly at work, I didn't know what hit me. It ended up going into bronchitis, and a cough that lasted for 8 weeks. I couldn't teach aerobics for 2 months.
Just a bit worried about leading a ride Saturday, but I will do something mild tomorrow and see how I feel, if all goes well.
And, I never can predict when/how strenuous stuff sets me off. I just try to get good rest and push through.