Student or Learner
"Last night, I was walking out from work late at night, and all of a sudden, out of nowhere, a bat sitting on the parking lot lawn charged toward me and within seconds flew very close to me. I did not have time to react or realize what happened or if it touched me.
How would I know If I was bitten by that bat? At what point would I need to take the vaccine?"
It's clear from the contex that she may have been bitten by a bat in the past.
1)Why would she say "How would I know If I was bitten by that bat?" not "How would I know If I had been bitten by that bat?
2) Would it mean the same as "She may have been bitten....", if I said "She could have been bitten......" ?