You are the reason we have lots of emerging resistance to antibiotics.
First, you most likely had a viral infection to begin with, OF COURSE you are going to feel better in 9 or 10 days.
Then you took an inadequate course of te antibiotic anyway. Kill off any easily susceptible germs ALLOW THE MORE RESISTANT ONES TO SURVIVE AND REPRODUCE.
But you of course know better.
Been self doctorin' for as long as I can remember.
I've stitched up a 2" gash in my knee ... maybe 40 years ago ... no scar.
Do you want to qualify that statement or do you want me to tear it apart ?